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 Breaker (Imaginary Trailblazer / Asta / Natasha)
Xueyi acts as the main DPS for this F2P team. Imaginary Trailblazer and Asta provide Break Effect, ATK and SPD buffs to amplify Xueyi, while Natasha handles healing and sustain.
Break Effect Burst (Fugue / Ruan Mei / Lingsha)
This comp focuses on maximizing Xueyi's Break Effect. Fugue and Ruan Mei boost Break and capitalize on weakness-broken enemies; Lingsha provides healing.
Dual DPS (Xueyi + Jingliu)
Xueyi functions as a Sub-DPS that deals damage outside her turn via Follow-up Attacks; pairing her with another on-turn DPS (like Jingliu) that breaks weakness lets Xueyi consistently proc her follow-ups.
Mono-Quantum (Sparkle / Silver Wolf / Fu Xuan)
Mono-Quantum comp where Silver Wolf implants Quantum weakness for the party. If the enemy already has Quantum weakness, replace Silver Wolf with a Harmony character that covers another weakness.
Skills
Deals #1[i]% of Xueyi's ATK as Quantum DMG to one designated enemy target.
Deals Quantum DMG equal to #1[i]% of Xueyi's ATK to one designated enemy, and Quantum DMG equal to #2[i]% of Xueyi's ATK to any adjacent enemies.
Deals Quantum DMG equal to #1[i]% 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 #3[f1]% 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 #1[i] stacks. When Xueyi's teammates reduce enemy Toughness with attacks, Xueyi gains #3[i] 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 #2[i]% 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