Xueyi 
Destruction Judge of the Ten-Lords Commission, which presides over the jurisdiction of life and death on the Luofu. For years after her death, she inhabited a puppet body and returned to the world to fulfill her mission.
HP
ATK
DEF
SPEEDBreak Effect Build
Best Light Cone
Xueyi Best Stats
Xueyi Best Substats
Xueyi Best Relics
Xueyi Best Teams
F2P Break Team (Imaginary Trailblazer / Asta / Natasha)
A free-to-play friendly Break-focused comp. Xueyi is the main DPS; Imaginary Trailblazer and Asta supply Break/ATK/SPD buffs to maximize her damage, while Natasha handles healing.
Super Break Xueyi (Fugue / Ruan Mei / Lingsha)
Build centered on maximizing Xueyi's Break Effect to deal huge Super Break DMG. Fugue and Ruan Mei raise Break Effect and increase damage on Weakness-Broken targets. Optionally equip the "Iron Cavalry Against the Scourge" relic to further boost Super Break DMG.
Dual DPS (Jingliu + Xueyi)
Xueyi functions as a sub-DPS whose follow-up attacks trigger off teammates breaking Weakness. Pairing her with another strong single-target DPS (like Jingliu) or fast SPD buffers maximizes off-turn damage.
Mono-Quantum Xueyi (Sparkle / Silver Wolf / Fu Xuan)
A mono-Quantum composition where Silver Wolf provides the implanted Quantum Weakness needed for Xueyi. If the enemy already has Quantum weakness, Silver Wolf can be swapped for another Harmony/Quantum damage unit.
Skills
Deals 0.5% of Xueyi's ATK as Quantum DMG to one designated enemy target.
Deals Quantum DMG equal to 0.7% of Xueyi's ATK to one designated enemy, and Quantum DMG equal to 0.35% of Xueyi's ATK to any adjacent enemies.
Deals Quantum DMG equal to 1.5% of Xueyi's ATK to one designated enemy target. This attack ignores Weakness Types and reduces the enemy's Toughness. When the enemy's Weakness is Broken, the Quantum Weakness Break effect is triggered. In this attack, the more Toughness is reduced, the higher the DMG will be dealt, up to a max of 36% increase.
When Xueyi reduces enemy Toughness with attacks, Karma will be stacked. The more Toughness is reduced, the more stacks of Karma are added, up to 8 stacks. When Xueyi's teammates reduce enemy Toughness with attacks, Xueyi gains 1 stack(s) of Karma. When Karma reaches the max number of stacks, consumes all current Karma stacks and immediately launches Follow-up ATK against an enemy target, dealing DMG for 3 times, with each time dealing Quantum DMG equal to 0.45% of Xueyi's ATK to a single random enemy. This Follow-up ATK will not add Karma stacks.
Unleashes an extra attack on the target. This effect is triggered automatically when requirements are met.
Traces
Eidolon
Increases the DMG dealt by the Talent's Follow-up ATK by
Unleashes an extra attack on the target. This effect is triggered automatically when requirements are met.
Talent's Follow-up ATK Reduces enemy Toughness regardless of Weakness types. At the same time, restores Xueyi's HP by an amount equal to
Unleashes an extra attack on the target. This effect is triggered automatically when requirements are met.
Skill Lv. +2, up to a maximum of Lv.
When using Ultimate, increases Break Effect by
Ultimate Lv. +2, up to a maximum of Lv.
The max stack limit for Karma decreases to