A sweet-tempered and elegant scholar. Member #81 of the Genius Society. An expert in the biological sciences. She earned Nous' attention with her talent and terrifying perseverance, and began her research on the origin of life in a secret corner of the universe. For that, she was invited by Herta to collaborate with Screwllum and Stephen to develop the Simulated Universe. Secretly, she greatly enjoys traditional theater and desserts, and she is also very interested in embroidery.
To learn more about Ruan Mei check the sections below. Use the tabs to quickly switch to the kind of information you're looking for - kit, traces, review or build guides.
Ruan Mei has at least one video guide available, so if you prefer this sort of medium to learn more about a character, check it out:
Last review update
Patch 2.0
Last major build/calcs update
Patch 2.0
Last profile update*
September 15th, 2024
*Profile update means smaller edits to relics, stats, synergies or teams that don't require new calculations.
To learn more about Ruan Mei check the sections below. Use the tabs to quickly switch to the kind of information you're looking for - kit, traces, review or build guides.
Profile
Review
Build and teams
MoC/PF/AS Statistics
Calculations
Profile
Threading Fragrance
Single Target
Energy gain: 20
Break: 10
String Sings Slow Swirls
Support
Energy gain: 30
Break: -
Petals to Stream, Repose in Dream
Support | 130 energy cost
Energy gain: 5
Break: -
Somatotypical Helix
Support
Energy gain: 0
Break: -
Silken Serenade
Enhance
Energy gain: 0
Break: -
Inert Respiration
Days Wane, Thoughts Wax
Candle Lights on Still Waters
Neuronic Embroidery
Eidolon 1
While the Ultimate's field is deployed, the DMG dealt by all allies ignores 20% of the target's DEF.
Reedside Promenade
Eidolon 2
With Ruan Mei on the field, all allies increase their ATK by 40% when dealing DMG to enemies with Weakness Break.
Viridescent Pirouette
Eidolon 3
Ultimate Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Chatoyant Éclat
Eidolon 4
When an enemy target's Weakness is Broken, Ruan Mei's Break Effect increases by 100% for 3 turn(s).
Languid Barrette
Eidolon 5
Skill Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
Sash Cascade
Eidolon 6
Extends the duration of the Ultimate's field by 1 turn(s). The Talent's Break DMG multiplier additionally increases by 200%.
Review
Provides the first-ever instance of Break Efficiency,
Rare RES PEN buff for the whole team,
Permanent teamwide SPD buff,
Near permanent uptime on all buffs,
Incredible damage contribution,
Universally applicable buffs,
The best buffer for dual-dps teams (especially DoT teams with Kafka),
Strong defensive utility with increased Breaking.
Extremely steep investment requirement to reach her full potential,
Delaying enemies may not be ideal for certain characters,
The Break Damage can 'kill steal' which isn't that great for damage dealers that rely on last-hitting enemies (like Seele),
Accessible Light Cone options are pants.
Ruan Mei is an exceptional support character. She is able to effortlessly buff the whole team’s DMG and increase everyone’s Break Efficiency with her Skill, something no other character is currently able to do. Her Ultimate increases all allies’ RES PEN and is able to delay the enemies again once their Weakness Break ends. She’s even got free bonus Break damage from her Talent that activates whenever allies Break an enemy, and the Talent itself provides a small but permanent SPD boost to all other characters in the party.
The definitely sane, definitely not megalomaniacal Genius Society member, Ruan Mei, is a fairly ridiculous character in the game. She is our very first support character to increase the Weakness Break Efficiency of characters; you know that one Nihility blessing in the Simulated Universe? Night Beyond Pyre, the one that increases Break Efficiency by 30%? Yeah, well, Ruan Mei can increase that by 50% and also have it permanently active.
Ruan Mei’s Skill gives her a buff called Overtone, lasting for 3 turns. This ticks down at the start of her turn. While she has Overtone, all allies’ DMG increases by 32% and Weakness Break Efficiency increases by 50%. This is kind of absurd already given that the application of this buff is entirely effortless, and having it last for 3 turns means that Ruan Mei has plenty of time to recover the SP she spent setting it up and then some. Weakness Break Efficiency is exceedingly powerful. Enemies take slightly reduced damage from all sources while they are not Broken, and this gets removed once they do get Broken, so if you’ve ever wondered why a Broken enemy seems to be taking so much more damage, this is why.
Usually, there is not a large window of opportunity to take advantage of this state, and it may be preferable to hold off on using big hitting abilities until after the enemy has recovered from Break so as to resume dealing Toughness damage. With this Skill’s effects active, you not only get enemies into that state faster, but it’s easier to repeatedly get them to that state even with weaker hitting attacks, meaning you’re more able to land those huge hits during the enemies’ most vulnerable period.
Ruan Mei’s Ultimate deploys a field for 2 turns, and this also ticks down at the start of her turn. While the field is active, all allies get 25% All-Type RES PEN. If you’ve been around for a while, or if you’re an avid user of Seele, you should understand how rare and powerful Resistance Penetration is by now. 25% is ridiculous, and with a 2-turn duration based on Ruan Mei’s turns, it’s extraordinarily easy to abuse this to the player’s benefit with faster characters or with turn manipulation.
In addition to this, ally attacks within the field apply a debuff to enemies called Thanatoplum Rebloom to enemies they hit. This effect triggers when an enemy attempts to recover from Weakness Break, extending their Weakness Break and delaying their action by 20% of Ruan Mei’s Break Effect plus 10%. This re-Break will also deal 50% of Ruan Mei’s Ice Break DMG. This works in tandem with her Skill to just bully enemies; you Break them faster with the Break Efficiency and then get to keep them Broken for longer, all while benefiting from the DMG bonuses and RES PEN. Important to note that Thanatoplum Rebloom can only trigger again after the enemy has fully recovered from Weakness Break.
The buffs she provides are already highly impressive even without considering the bonus provided by the Break extension, but with her Talent she provides even more benefits, and she can even contribute some damage of her own. She permanently increases all other teammates’ SPD by 10%, and whenever an ally Breaks an enemy, Ruan Mei will instantly deal damage equal to 120% of her Ice Break DMG. This is not a follow-up attack, this damage is inflicted alongside the Break damage of the ally inflicting Break.
A 10% SPD boost is just about enough to be significant and to meet specific SPD thresholds for characters. However, being able to contribute Break damage without even needing to be the one to Break enemies is ridiculously good, especially as it’s actually a higher multiplier if you let other allies do it for you; this solves the biggest problem with building for Break Effect which is that if you’re not the one to Break enemies, that stat is functionally useless for you. For Ruan Mei, this is most assuredly not the case, so don’t be surprised to be seeing light blue damage numbers in the five-digit range showing up alongside Breaks later on.
It’s clear by now that Ruan Mei benefits the Break playstyle significantly and also benefits from Break Effect% herself as she has so many ways to utilise it. With her Bonus Ability Traces, Ruan Mei reaches a new height that makes her supportive capabilities begin to approach the omnipresent power of Bronya. A2 increases all allies’ Break Effect by 20%, and A4 will regenerate 5 Energy for Ruan Mei at the start of her turn.
A6 is where the big money is; in combat, for every 10% Break Effect that Ruan Mei has that exceeds 120%, her Skill’s DMG bonus increases by an additional 6%, up to a maximum of 36% extra. That means that if you can reach at least 180% Break Effect, Ruan Mei’s Skill is now providing a ridiculous 68% DMG bonus to all allies in addition to its already powerful 50% Break Efficiency. While it is no small feat to achieve such a high Break Effect stat, the mere fact that it’s possible to do so puts Ruan Mei’s supportive capabilities right at the top alongside Bronya and Tingyun.
Eidolon-wise, it’s complete overkill in all cases. E1 is great value because it also gives allies a 20% DEF ignore during the Ultimate, but again, it’s opulence to excess.
Ruan Mei’s buffs all play extremely well with other Harmony supports due to not affecting ATK at all and having two different buffs that fully stack with one another. Combine her with Asta or Hanya and you’ll supercharge a damage dealer and make them a speed demon, or combine her with Tingyun and make a damage dealer’s Ultimate frequent and absurd. You can even just use her alongside Bronya and have what is likely to be the new defacto strongest hypercarry setup in the game.
Ruan Mei is also very good at facilitating double carry comps, overtaking Asta in that regard, as being able to buff everyone on the team with no effort means that it’s quite easy to keep two damage dealers strong throughout a fight, especially with Ruan Mei’s excellent SP economy. This means that in Kafka DoT teams and Topaz follow-up teams, Ruan Mei is poised to be the leading lass in terms of Harmony supports, and the improvement from including her will be extremely stark.
Usually, I talk about support characters’ damage contribution as ‘non-negligible’ meaning it’s a nice addition to have. Just by being in the team and being well-invested, Breaking of smaller enemies will cause them to simply explode into confetti, again by simply being in the party. The defensive benefits of Breaking enemies quickly and keeping them Broken for longer also cannot be understated, and she can end up greatly assisting lower investment sustain options to keep up by uhh, lemme check my notes here… ‘Murdering things before they can murder you.’ Yeah that sounds about right.
The one truly big downside of Ruan Mei is the obscene investment she demands to reach her peak. As stated earlier, reaching 180% Break Effect is extremely challenging, even with sacrificing your Link Rope. Even if you do reach that amount or close to it, you’ll likely be sacrificing a fair few defensive substats as well, so this is something you need to account for, even if it is partially solved by the increase in Break frequency she provides. Outside of her signature, her Light Cone options are also fairly dismal all things considered, so this should also be taken into account.
With how Ruan Mei and Xueyi’s kits are designed, it seems to be pointing at a potential shift in what is considered strong or even possible; the focus on Break for both of these characters is somewhat suspect, and I’d advise keeping a close eye on the progression of Ruan Mei over time. Even without that potential future, Ruan Mei is a powerhouse of a Harmony unit, and you can’t go wrong by trying to obtain her.
Also, stop it, you can’t fix her. Stop it.
Honkai: Star Rail is a game where team building matters most and while our tier list takes the optimal setup into account, a lot of characters can work and do well - even those ranked lower - when you invest into them. Also for story or lower difficulties of Simulated Universe, you don't need to worry about ratings and tiers. You can safely clear that content even with F2P characters as long as you build your team correctly.
Character at 5★ are rated at their Eidolon 0 with their best in slot non-limited Light Cone.
Available ratings:
MoC
PF
AS
Build and teams
The percentage numbers showcase the relative DPS increase when you take into account the set bonus only. For some characters there's no DPS (or its equivalent) available and in that case we listed the sets in the order of priority.
1
Increases Break Effect by 16%.
When the wearer uses their Ultimate on an ally, Break Effect for all allies increases by 30% for 2 turn(s). This effect cannot be stacked.
2
Increases SPD by 6%.
When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.
Increases Break Effect by 16%.
When the wearer uses their Ultimate on an ally, Break Effect for all allies increases by 30% for 2 turn(s). This effect cannot be stacked.
3
Increases Break Effect by 16%
Increases the wearer's Break Effect by 16%. When the wearer inflicts Weakness Break on an enemy, regenerates 3 Energy.
4
Increases SPD by 6%.
When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.
1
Increases the wearer's Max HP by 12%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8%.
2
Increases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.
3
Increases wearer's Energy Regeneration Rate by 5%. Increases DMG for all other allies with the same DMG Type as the wearer by 10%.
4
Increases the wearer's Break Effect by 16%. When the wearer's SPD reaches 145 or higher, the wearer's Break effect increases by an extra 20%.
Break Effect (Until 180%) > SPD (Until Breakpoint) > HP% = DEF% > Effect RES (30% if using Broken Keel)
If you want to learn more about the various stats and breakpoints, expand the section below.
Body - HP% > DEF%
HP% is preferred as it offers more survivability but DEF% can be used if it has superior sub-stats.
Feet - Speed
Best in slot.
Planar Sphere - HP% > DEF%
HP% is preferred as it offers more survivability but DEF% can be used if it has superior sub-stats.
Link Rope - Energy Recharge% > Break Effect%
If you are able to hit the 180% Break Effect cap without using a Break Effect rope Energy Recharge is always recommended.
Stack Break Effect until hitting 180%. Aim for a desirable Speed breakpoint next (134 minimum recommended). After achieving these goals stack more Break Effect to improve Ruan's burst damage or invest in more Speed or DEF% and HP% to make her more durable.
SPEED: Ruan Mei, is a skill point positive support so stacking more Speed on her will assist with skill point generation. Unlike other supports though she can offer the full benefits of her kit without worrying about how fast she is compared to the rest of her team. Because of this until you achieve her Break requirements Speed is a lower priority.
BREAK EFFECT: Thanks to Ruan's bonus ability - Candle Lights on Still Waters - she gains up to 36% increased damage for the whole team when at 180% Break Effect or higher. Ensuring this is the case is your number 1 priority when building Ruan. More Break Effect than this is still helpful, it will boost Ruan's damage contribution in fights offering even higher burst damage allowing for incredibly easy removal of smaller enemies thanks to her talent.
Energy Recharge:
To consistently achieve a 4-action rotation when using her Signature, Ruan requires an Energy Recharge rope,
When using S5 Meshing Cogs or S5 Memories of the Past to consistently gain a 3-action rotation it's also required,
Due to the power of her Ultimate, gaining Energy Recharge where it makes sense for your build and team comps is advised.
HP: 3700 - 5000+
DEF: 1000 - 1100+
SPD: 109 / 121 / 134 (Recommended)
Energy Regeneration Rate: 119.44%+
Break Effect: 180%+ (with A2 active)
Ultimate = Talent = Skill > Basic
Candle Lights on Still Waters (A6) > Inert Respiration (A2) > Days Wane, Thoughts Wax (A4)
The numbers show the percentage damage output increase/decrease compared to the Light Cone marked with 100%.
Increases the wearer's Break Effect by 60/70/80/90/100%. After the wearer uses their Ultimate, increases all allies' DMG by 24/28/32/36/40%, lasting for 3 turns. Should the wearer's Break Effect exceed or equal 150%, 1 Skill Point will be recovered. At the start of each wave, immediately regenerates 10/12.5/15/17.5/20 Energy for all allies. Effects of the same type cannot stack.
Source: Event Warp (limited)
Increases the wearer's Break Effect by 28/35/42/49/56%. When the wearer attacks, additionally regenerates 4/5/6/7/8 Energy. This effect can only be triggered 1 time per turn.
Source: Stellar Warp
After the wearer uses attacks or gets hit, additionally regenerates 4/5/6/7/8 Energy. This effect can only be triggered 1 time per turn.
Source: Stellar Warp
At the start of the battle and whenever the wearer's turn begins, one of the following effects is applied randomly: All allies' ATK increases by 10/12.5/15/17.5/20%, all allies' CRIT DMG increases by 12/15/18/21/24%, or all allies' Energy Regeneration Rate increases by 6/7.5/9/10.5/12%. The applied effect cannot be identical to the last effect applied, and will replace the previous effect. The applied effect will be removed when the wearer has been knocked down. Effects of the similar type cannot be stacked.
Source: Nameless Glory
When the wearer uses their Ultimate, all allies' actions are Advanced Forward by 16/18/20/22/24%
Source: Stellar Warp
The table below scores the Light Cones based on their performance in four areas:
Light Cone | Personal Stats | Energy Regen | Team Buffs |
---|---|---|---|
Meshing Cogs | 1/5 | 5/5 | 0/5 |
Memories of the Past | 4/5 | 4.5/5 | 0/5 |
Past Self in Mirror | 5/5 | 2/5 | 5/5 |
Carve the Moon, Weave the Clouds | 2.5/5 | 1/5 | 2/5 |
Dance! Dance! Dance! | 2/5 | 0/5 | 3.5/5 |
The teams in the section are generated based on the current Memory of Chaos data we have gathered. If you want to see more statistics about the mode, check the MoC/PF/AS Statistics tab.
MoC/PF/AS Statistics
This section contains information about Ruan Mei performance in the latest Memory of Chaos cycle (2.4), latest Pure Fiction (2.4) and the latest Apocalyptic Shadow (2.4), and the commonly used Relics and Cones in both modes. The page will be automatically updated every 2 weeks once enough data is gathered in the current cycle.
If you want to share your clear information with us, you simply need to fill the form below and provide us with your UID and make your Hoyo profile public - we will automatically parse the MoC/PF clear information from your profile after that!
MoC/PF/AS Stats FormCharacters are ranked with appearance rate, which is how often a character was used in Memory of Chaos by the players who we have scanned, regardless of whether they own the character or not. Ownership rate currently cannot be obtained.
Characters are ranked with appearance rate, which is how often a character was used in Pure Fiction by the players who we have scanned, regardless of whether they own the character or not. Ownership rate currently cannot be obtained.
Characters are ranked with appearance rate, which is how often a character was used in Apocalyptic Shadow by the players who we have scanned, regardless of whether they own the character or not. Ownership rate currently cannot be obtained.
This section lists the characters that were most commonly paired with Ruan Mei in the current phase of Memory of Chaos.
This section lists the characters that were most commonly paired with Ruan Mei in the current phase of Pure Fiction.
This section lists the characters that were most commonly paired with Ruan Mei in the current phase of Apocalyptic Shadow.
Eidolons data comes from players we have scanned who used Ruan Mei in the current MoC cycle (9047), in the current PF cycle (6221) or in the current AS cycle (8026) and had the character placed in their Profile.
67.81%
7.89 cyc.Eidolon 0
26.75%
6.11 cyc.While the Ultimate's field is deployed, the DMG dealt by all allies ignores 20% of the target's DEF.
3.9%
5.14 cyc.With Ruan Mei on the field, all allies increase their ATK by 40% when dealing DMG to enemies with Weakness Break.
0.37%
6 cyc.Ultimate Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
0.1%
4.17 cyc.When an enemy target's Weakness is Broken, Ruan Mei's Break Effect increases by 100% for 3 turn(s).
0.02%
99.99 cyc.Skill Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
1.07%
2 cyc.Extends the duration of the Ultimate's field by 1 turn(s). The Talent's Break DMG multiplier additionally increases by 200%.
Light Cones are ranked with usage rate among the players we have scanned who used Ruan Mei in the current MoC cycle (9047), in the current PF cycle (6221) or in the current AS cycle (8026) and had the character placed in their Profile.
46.46%
8.25 cyc.Increases the wearer's Break Effect by 28/35/42/49/56%. When the wearer attacks, additionally regenerates 4/5/6/7/8 Energy. This effect can only be triggered 1 time per turn.
Source: Stellar Warp
39.83%
7.83 cyc.Increases the wearer's Break Effect by 60/70/80/90/100%. After the wearer uses their Ultimate, increases all allies' DMG by 24/28/32/36/40%, lasting for 3 turns. Should the wearer's Break Effect exceed or equal 150%, 1 Skill Point will be recovered. At the start of each wave, immediately regenerates 10/12.5/15/17.5/20 Energy for all allies. Effects of the same type cannot stack.
Source: Event Warp (limited)
9.81%
7.58 cyc.After the wearer uses attacks or gets hit, additionally regenerates 4/5/6/7/8 Energy. This effect can only be triggered 1 time per turn.
Source: Stellar Warp
2.98%
7.89 cyc.When the wearer uses their Ultimate, all allies' actions are Advanced Forward by 16/18/20/22/24%
Source: Stellar Warp
0.4%
7.9 cyc.Increases the wearer's Energy Regeneration Rate by 10/12/14/16/18% and regenerates 1 Skill Point when the wearer uses their Ultimate on an ally. This effect can be triggered after every 2 uses of the wearer's Ultimate. When the wearer uses their Skill, the next ally taking action (except the wearer) deals 30/35/40/45/50% more DMG for 1 turn(s).
Source: Stellar Warp
0.29%
7.92 cyc.At the start of the battle and whenever the wearer's turn begins, one of the following effects is applied randomly: All allies' ATK increases by 10/12.5/15/17.5/20%, all allies' CRIT DMG increases by 12/15/18/21/24%, or all allies' Energy Regeneration Rate increases by 6/7.5/9/10.5/12%. The applied effect cannot be identical to the last effect applied, and will replace the previous effect. The applied effect will be removed when the wearer has been knocked down. Effects of the similar type cannot be stacked.
Source: Nameless Glory
0.06%
7 cyc.Upon battle entry, if an ally deals the same DMG Type as the wearer, DMG dealt increases by 12/15/18/21/24%.
Source: Stellar Warp
0.04%
9 cyc.When the wearer uses their Skill, then the next ally taking action (except the wearer) deals 16/20/24/28/32% increased DMG for 1 turn(s).
Source: Echo of War | Forgotten Hall Store | Mission Reward
0.02%
99.99 cyc.After entering battle, increases the ATK of all allies by 8/9/10/11/12%. Effects of the same type cannot stack.
Source: Stellar Warp
0.02%
99.99 cyc.After the wearer uses a Basic ATK, Skill, or Ultimate, all allies gain Childishness, which increases the DMG dealt by the corresponding ability they used by 12/14/16/18/20%. Childishness only takes effect with the most recent ability used by the wearer and cannot be stacked.
Source: Forgotten Hall Store
Relic Sets are ranked with usage rate among the players we have scanned who used Ruan Mei in the current MoC cycle (9047), in the current PF cycle (6221) or in the current AS cycle (8026) and had the character placed in their Profile. The results are limited to top 5 combinations. Flex means 2 random Relic pieces that don't combine into a Set.
30.81%
Increases Break Effect by 16%
Increases the wearer's Break Effect by 16%. When the wearer inflicts Weakness Break on an enemy, regenerates 3 Energy.
Increases SPD by 6%.
When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.
27.55%
Increases Break Effect by 16%.
When the wearer uses their Ultimate on an ally, Break Effect for all allies increases by 30% for 2 turn(s). This effect cannot be stacked.
16.25%
Increases SPD by 6%.
When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.
14.22%
Increases Break Effect by 16%
Increases the wearer's Break Effect by 16%. When the wearer inflicts Weakness Break on an enemy, regenerates 3 Energy.
6.22%
Increases Break Effect by 16%
Increases the wearer's Break Effect by 16%. When the wearer inflicts Weakness Break on an enemy, regenerates 3 Energy.
Increases Break Effect by 16%.
When the wearer uses their Ultimate on an ally, Break Effect for all allies increases by 30% for 2 turn(s). This effect cannot be stacked.
32.85%
Increases the wearer's Energy Regeneration Rate by 5%. When the wearer's SPD reaches 120 or higher, the wearer's action is Advanced Forward by 40% immediately upon entering battle.
18.21%
Increases the wearer's Max HP by 12%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8%.
17.25%
Increases wearer's Energy Regeneration Rate by 5%. Increases DMG for all other allies with the same DMG Type as the wearer by 10%.
16.11%
Increases the wearer's Break Effect by 16%. When the wearer's SPD reaches 145 or higher, the wearer's Break effect increases by an extra 20%.
13.12%
Increases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.
Relic Stats are shown based on the Relics used by the players we have scanned who used Ruan Mei in the current MoC cycle (9047), in the current PF cycle (6221) or in the current AS cycle (8026) and had the character placed in their Profile.
Calculations
Ruan Mei calculations aren't available yet.
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Stack Break Effect until 180%. Aim for a desirable Speed breakpoint next (134 minimum recommended). After achieving these goals stack more Break Effect to improve Ruan's burst damage or invest in more Speed or DEF% and HP% to make her more durable.