Acheron 
Nihility A drifter claiming to be a Galaxy Ranger. Her true name is unknown. She walks the cosmos alone, carrying with her a long sword.
HP
ATK
DEF
SPEEDNihility Dps Build
Best Light Cone
Acheron Best Stats
Acheron Best Substats
Acheron Best Relics
Acheron Best Ornaments
Izumo Gensei and Takama Divine Realm
Firmament Frontline: Glamoth
Inert Salsotto
Acheron Best Teams
F2P: Acheron + Asta + Trailblazer (Fire) + Lynx
Free-to-play starter team. Asta and the Fire Trailblazer supply Burn and Taunt debuffs respectively to help Acheron stack her Slashed Dream. Fire Trailblazer can equip Trend of the Universal Market to apply Burn. Since Acheron scales with Nihility units, replace supports with dedicated debuffers (Nihility) when available.
Eidolon 0–1: Nihility Core (Acheron + Jiaoqiu + Cipher + Aventurine)
Acheron's best early-game team (E0–E1) uses two other Nihility units to max the DMG buff from her Bonus Ability. Jiaoqiu and Cipher supply debuffs to build Slashed Dream stacks; Cipher can run relics that increase debuff application. Aventurine offers shields and an implant debuff; preservation units often benefit from Trend of the Universal Market when Jiaoqiu isn't present.
Eidolon 2+: Nihility + Harmony (Acheron + Jiaoqiu + Sunday + Aventurine)
Once Acheron reaches Eidolon 2, you can swap the second Nihility slot for a Harmony unit and still activate the full Bonus Ability DMG buff. This allows flexible builds that keep one Nihility debuffer (e.g., Jiaoqiu) plus a Harmony buffer (e.g., Sunday, Sparkle, Bronya) while retaining sustain from Aventurine.
Skills
Deals Lightning DMG equal to 0.5% of Acheron's ATK to one designated enemy target.
Gains 1 point(s) of "Slashed Dream." Inflicts 1 stack(s) of "Crimson Knot" on one designated enemy target, dealing Lightning DMG equal to 0.8% of Acheron's ATK to this target, as well as Lightning DMG equal to 0.3% of Acheron's ATK to adjacent targets.
Sequentially unleash "Rainblade" 3 times and "Stygian Resurge" 1 time, dealing Lightning DMG up to 2.23% of Acheron's ATK to one designated enemy target, as well as Lightning DMG up to 1.8% of Acheron's ATK to other targets. "Rainblade": Deals Lightning DMG equal to 14% of Acheron's ATK to one designated enemy target and removes up to 3 stacks of "Crimson Knot" from the target. When "Crimson Knot" is removed, immediately deals Lightning DMG equal to 9% of Acheron's ATK to all enemies. For every stack of "Crimson Knot" removed, this DMG Multiplier is additionally increased, up to a maximum of 36%. "Stygian Resurge": Deals Lightning DMG equal to 0.72% of Acheron's ATK to all enemies and remove all "Crimson Knots." "Crimson Knot" cannot be applied to enemies during the Ultimate.
When Slashed Dream reaches 9 point(s), the Ultimate can be activated. During the Ultimate, reduces enemies' Toughness regardless of Weakness Types and reduces all enemies' All-Type RES by 0.1%, lasting until the end of the Ultimate. When any unit inflicts debuffs on an enemy target while using their ability, Acheron gains 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on a target. If debuffs are inflicted on multiple targets, then the 1 stack of Crimson Knot will be inflicted on the enemy target with the most Crimson Knot stacks. This effect can only trigger once for every ability use. After an enemy target exits the field or gets defeated by any unit while Acheron is on the field, their Crimson Knot stacks will be transferred to the enemy target with the most Crimson Knot stacks on the whole field.
Traces
Eidolon
When dealing DMG to debuffed enemies, increases CRIT Rate by
Debuffs are negative status effects that render units weaker. Unless otherwise specified, debuffs can be dispelled.
The number of Nihility characters required for the Trace "The Abyss" to achieve its highest possible effect is reduced by 1. When this unit's turn starts, gains 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on the enemy with the most Crimson Knot stacks.
Ultimate Lv. +2, up to a maximum of Lv.
When enemy targets enter combat, inflicts them with the Ultimate DMG Vulnerability, increasing the amount of Ultimate DMG they take by
Skill Lv. +2, up to a maximum of Lv.
Increases the All-Type RES PEN for the Ultimate DMG dealt by Acheron by
When dealing DMG, ignore a part of the enemy target's resistance to the corresponding damage type.