Ruan Mei 
Harmony A member of the Genius Society and an expert in life sciences. She teamed up with Herta and others to develop the Simulated Universe.
HP
ATK
DEF
SPEEDBreak Dmg Support Build
Best Light Cone
Ruan Mei Best Stats
Ruan Mei Best Substats
Ruan Mei Best Relics
Ruan Mei Best Teams
F2P Break — March 7th
Free-to-play Break team built around Ruan Mei's party-wide Break Efficiency and Break Effect buffs. March 7th serves as the primary Break DPS, Trailblazer can enable Super Break DMG, and Gallagher provides sustain and Besotted application to increase Break DMG.
Break Effect — Firefly / Fugue
Team focused on increasing Break Effect for characters that scale with Break. Ruan Mei delays enemy recovery from Weakness Break to lengthen windows for Super Break DMG and DoT triggers.
DoT / Break Efficiency — Kafka
DoT-oriented team where Ruan Mei's Break Efficiency and Break Effect buffs let enemies remain Broken longer and trigger more DoTs. Good for characters that rely on Weakness Break timing to maximize DoT uptime.
Toughness / Break — Castorice (Ice Trailblazer)
Ruan Mei paired with Toughness DMG dealers (like Castorice) to maximize Break and Toughness damage. Can be built with additional support or preservation depending on content difficulty.
Dual DPS Example — Castorice + Mydei
Example Dual-DPS comp showcasing how Ruan Mei's party-wide Break buffs enable two DPS to benefit simultaneously. Useful vs Elite enemies sharing an elemental weakness — multiple DPS can exploit the same Broken windows.
Skills
Deals Ice DMG equal to #1[i]% of Ruan Mei's ATK to one designated enemy target.
After using her Skill, Ruan Mei gains Overtone, lasting for #3[i] 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 #1[f1]% and Weakness Break Efficiency increases by #2[i]%.
Ruan Mei deploys a Zone that lasts for #2[i] 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 #1[f1]% 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 #3[i]% of Ruan Mei's Break Effect plus #4[i]%, and dealing Break DMG equal to #5[i]% of Ruan Mei's Ice Break DMG. Enemy targets cannot have Thanatoplum Rebloom re-applied to them until they recover from Weakness Break.
When enemy targets' Toughness is reduced to 0, they will enter the Weakness Break State, which delays their actions.
Increases the target's waiting interval before the next action.
Break DMG increases with higher Break Effect, higher target max Toughness, and higher character levels. Break DMG cannot CRIT Hit and is not affected by DMG Boost effects.
Increases SPD by #1[f1]% 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 #2[f1]% of her Ice Break DMG.
Break DMG increases with higher Break Effect, higher target max Toughness, and higher character levels. Break DMG cannot CRIT Hit and is not affected by DMG Boost effects.
After using the Technique, gains Silken Serenade. At the start of the next battle, automatically triggers the Skill for #1[i] 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 #4[i] Blessings will be taken into account), additionally increases the Toughness Reduction of this attack by #2[i]%. After breaking an enemy target's Weakness, additionally deals to the enemy target Break DMG equal to #3[i]% of Ruan Mei's Ice Break DMG.
Traces
Eidolon
While the Ultimate's Zone is deployed, the DMG dealt by all allies ignores
While Ruan Mei is on the field, all allies increase their ATK by
When enemy targets' Toughness is reduced to 0, they will enter the Weakness Break State, which delays their actions.
Ultimate Lv. +2, up to a maximum of Lv.
When an enemy target's Weakness is Broken, Ruan Mei's Break Effect increases by
Skill Lv. +2, up to a maximum of Lv.
Extends the duration of the Ultimate's Zone by
Break DMG increases with higher Break Effect, higher target max Toughness, and higher character levels. Break DMG cannot CRIT Hit and is not affected by DMG Boost effects.