Harmony
Ice5★ “Without accelerating or postponing the arrival of death, life will always wither.”
Ruan Mei buffs almost everything for the whole team: DMG, SPD, Weakness Break Efficiency and All-Type RES PEN. She also keeps enemies Weakness Broken for longer and deals extra Break DMG on her own. She is a core member of Super Break teams, but her buffs are broad enough to bring into lots of other teams too, so she is very much worth pulling.
She suits you best if you play Firefly, Boothill or Rappa, because Ruan Mei gives them exactly what they need. If you don't play Break teams, she still works well, she just isn't the number one pick in those teams anymore.
Ruan Mei's kit scales on Break Effect, but she also needs her Ultimate back quickly and needs to move early so her buffs stay up. That's why she runs an Energy Regeneration Rate Rope and SPD Boots, while her substats go into Break Effect until 180% and SPD until your breakpoint.
Past Self in Mirror
Best
In Pursuit of the Wind
Great
Memories of the Past
Great
Meshing Cogs
Good
Dance! Dance! Dance!
Good
For Body and Planar Sphere, HP% comes first, but DEF% is fine too. Both help Ruan Mei take hits in harder content. On the Rope, go for Energy Regeneration Rate over Break Effect, because she needs her Ultimate back quickly. You can make up the Break Effect from substats, Traces and relic sets.
Once you have 180% Break Effect and your SPD breakpoint, it's up to you: add more Break Effect so Ruan Mei deals more damage, or add SPD, HP% and DEF% to make her tougher.
Her Skill raises the DMG buff for the whole team, her Ultimate raises the All-Type RES PEN and Thanatoplum Rebloom's damage, and her Talent raises the SPD buff and Ruan Mei's Ice Break DMG. If you have to choose, the Talent can come slightly after the Skill and Ultimate. Leave Basic ATK for last, since most of her damage comes from Weakness Break.
Candle Lights on Still Waters is the most valuable one: for every 10% of Break Effect above 120%, her Skill increases allies' DMG by another 6%, up to 36%. Inert Respiration gives the whole team 20% Break Effect, and Days Wane, Thoughts Wax regenerates 5 Energy at the start of her turn.
E1 makes the whole team ignore 20% of the enemy's DEF while her Ultimate's field is up. E2 gives allies 40% ATK when hitting Weakness Broken enemies, but if you only use Ruan Mei in Super Break teams, that ATK does nothing. E4 gives Ruan Mei 100% Break Effect for 3 turns when an enemy's Weakness is Broken, so you don't need to stack as much Break Effect on her. E6 extends the field by 1 turn and raises her Talent's Break DMG multiplier by another 200%.
Firefly and Fugue both scale on Break Effect, so they get the full value of Ruan Mei's buffs. Ruan Mei gets enemies Weakness Broken faster and then keeps them Broken for longer, which gives Firefly more chances to deal Super Break DMG. Against lots of Elite enemies, Boothill is the better fit, and against more than three enemies, Rappa is.
Ruan Mei raises the whole team's DMG and Weakness Break Efficiency. March 7th (The Hunt) gets full use of Ruan Mei's All-Type RES PEN and Break Effect, while Trailblazer (Harmony) unlocks Super Break DMG. Gallagher's healing scales on Break Effect, so Ruan Mei's buff also makes him heal more.
Thanatoplum Rebloom keeps enemies Weakness Broken for longer, so they take more DoT ticks before they recover and get to attack. Weakness Break also applies its own DoT effects, and the Break Efficiency buff helps your team trigger them faster. Sampo, Luka and Guinaifen all break Weakness a lot sooner with this buff.
Ruan Mei is great with DPS characters who deal a lot of Toughness damage, because her Break Efficiency buff lets them break Weakness even faster. For the remaining support slot, add another buffer for more damage, or use Gepard or Fu Xuan to keep the team safer in harder content.
Ruan Mei gives Firefly everything she needs: Break Efficiency, SPD and longer Weakness Break on enemies. Firefly also scales on Break Effect, so Ruan Mei's buffs help her even more.
A second Break-focused support who makes use of almost all of Ruan Mei's buffs except the DMG boost. Thanks to the Trailblazer's Super Break DMG, Ruan Mei herself gets to deal damage too.
Together with Ruan Mei, she forms the core support pair of Break teams, and she also benefits from Ruan Mei's Break Effect buff.
Needs exactly what Ruan Mei offers: Break Efficiency, SPD and longer Weakness Break. A better fit than Firefly against lots of Elite enemies.
Also gets the full value of Ruan Mei's Break buffs, and is stronger than Firefly when you face more than three enemies.
Lets the team deal Break DMG even when enemies aren't Weakness Broken, and often teams up with Firefly and Ruan Mei.
His healing scales on Break Effect, so Ruan Mei's buff goes straight into his healing. His Ultimate also inflicts Besotted, which makes enemies take more Break DMG.
Pela lowers enemy DEF while Ruan Mei adds All-Type RES PEN, so the two complement each other very well.
After using her Skill, Ruan Mei gains Overtone for 3 turns. While she has Overtone, the whole team deals more DMG and gets 50% Weakness Break Efficiency, which means their hits take down Toughness faster. Since the buff lasts 3 turns, you have plenty of time to get your Skill Points back. With 180% Break Effect, her Candle Lights on Still Waters Trace adds up to 36% more DMG to this buff.
Her Ultimate deploys a field for 2 turns. While it is up, the whole team gets All-Type RES PEN, a very rare kind of buff. Allies' attacks inside the field apply Thanatoplum Rebloom to the enemies they hit. When an enemy tries to recover from Weakness Break, it triggers, extending their Weakness Break, delaying their action by 20% of Ruan Mei's Break Effect plus 10%, and dealing extra Ice Break DMG. An enemy can only get Thanatoplum Rebloom again after fully recovering from Weakness Break.
Enemies that aren't Weakness Broken take slightly less damage, and that reduction goes away once they are Broken. Normally that window is fairly short. With Ruan Mei, your team breaks Toughness faster thanks to Overtone, then keeps enemies Broken longer thanks to Thanatoplum Rebloom, so you get more chances to land big hits right when enemies are at their weakest.
Just by being on the field, Ruan Mei permanently raises the SPD of all her teammates (not herself). Whenever an ally breaks an enemy's Weakness, she deals extra Ice Break DMG to that enemy, even though she wasn't the one who broke it. This is not a Follow-up ATK, it lands together with the ally's Break DMG, so Ruan Mei's Break Effect doesn't go to waste even when she doesn't do the breaking herself.
Deals Ice DMG equal to 140% of Ruan Mei’s ATK to one designated enemy target.
After using her Skill, Ruan Mei gains Overtone, lasting for 3 turn(s). This duration decreases by 1 at the start of Ruan Mei’s every turn. When Ruan Mei has Overtone, all allies’ DMG increases by 40.0% and Weakness Break Efficiency increases by 50%.
Ruan Mei deploys a Zone that lasts for 2 turns. The Zone’s duration decreases by 1 at the start of her turn.
While inside the Zone, all allies’ All-Type RES PEN increases by 30.0% and their attacks apply Thanatoplum Rebloom to the enemies hit.
When these enemies attempt to recover from Weakness Break, Thanatoplum Rebloom is triggered, extending the duration of their Weakness Break, delaying their action by an amount equal to 20% of Ruan Mei’s Break Effect plus 10%, and dealing Break DMG equal to 60% of Ruan Mei’s Ice Break DMG.
Enemy targets cannot have Thanatoplum Rebloom re-applied to them until they recover from Weakness Break.
Increases SPD by 11.0% for all teammates (i.e., excluding this unit). When allies Break an enemy target’s Weakness, Ruan Mei deals to this enemy target Break DMG equal to 150.0% of her Ice Break DMG.
After using the Technique, gains Silken Serenade. At the start of the next battle, automatically triggers the Skill for 1 time(s) without consuming Skill Points.
In Simulated Universe or Divergent Universe, when Ruan Mei has Silken Serenade, the team actively attacking enemies will always be regarded as attacking their Weakness to enter combat, and this attack can reduce all enemies’ Toughness regardless of Weakness types. When breaking Weakness, triggers Weakness Break Effect corresponding to the attacker’s Type. For every Blessing in possession (up to a max of 20 Blessings will be taken into account), additionally increases the Toughness Reduction of this attack by 100%. After breaking an enemy target’s Weakness, additionally deals to the enemy target Break DMG equal to 100% of Ruan Mei’s Ice Break DMG.
While the Ultimate’s Zone is deployed, the DMG dealt by all allies ignores 20% of the target’s DEF.
While Ruan Mei is on the field, all allies increase their ATK by 40% when dealing DMG to enemies that are Weakness Broken.
Ultimate Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.
When an enemy target’s Weakness is Broken, Ruan Mei’s Break Effect increases by 100% for 3 turn(s).
Skill Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.
Extends the duration of the Ultimate’s Zone by 1 turn(s). The Talent’s Break DMG multiplier additionally increases by 200%.
Ruan Mei is a support character who can increase Weakness Break Efficiency, SPD, and All-Type RES PEN for her team. At the same time, Ruan Mei deals extra Break DMG whenever any ally breaks an enemy’s Weakness, and she further delays the action of enemies in the Weakness Broken state.
Zenless Zone Zero
