characters acheron

Acheron

NihilityLightning5★
Last updated: 09/03/2026

“Lone voyagers in the cosmos are driven by two desires: to tread in the trails of the past and to forge their own way. But under THEIR scrutiny… most end up adhering to the former.”

Other Names
Raiden Bosenmori Mei
Species
Oni
Path story
Nihility
World
Cosmic
Role
Penacony
Signature Light Cone
Along the Passing Shore
Debut Banner
Words of Yore
Release Date
2024-03-27
Version
introduced in 1.5, playable from 2.1

Faction

  • Self-Annihilators
  • Galaxy Rangers
EN Allegra Clark
CN Juhuahua (菊花花)
JP Sawashiro Miyuki (沢城みゆき)
KR Park Ji-yoon (박지윤)

Playstyle overview

Acheron is a damage dealer who builds up the Charge she needs for her Ultimate by inflicting debuffs on enemies. While her Ultimate is active, she ignores enemy Weakness Types and Toughness reduction rules and lowers the elemental RES of all enemies. During exploration, Acheron’s Technique can also instantly defeat certain enemies.

Stats Base

Lv. 80
  • HP Base
  • ATK Base
  • DEF Base
  • SPD
  • Taunt

Ascension Materials

20304050607080
Pros & Cons

Pros

  • An Ultimate that deals AoE damage and then converts into bouncing hits, extremely effective in most fights
  • Insane self-buffing: a permanent 1.6x independent damage multiplier while running two Nihility teammates, plus 90% more damage after using her Ultimate
  • While her Ultimate is active she ignores Weakness Types and pierces 20% RES, so she can fight anything
  • She does not need the most expensive premium buffers, which frees them up for other characters
  • Her Technique kills on the spot, and she also sweeps through fights that cannot be ended outright

Cons

  • Needs two other Nihility characters to reach her ceiling, and she prefers the limited Nihility units
  • Her damage multipliers are fairly weak next to the version 3 roster
  • Free Light Cone options are quite limited, while her signature Light Cone makes her far more consistent
  • She needs debuffs landing on enemies constantly, which sometimes narrows your choice of sustain unit

Best Acheron Build Guide

Nihility DPS Build

Stat Targets

  • CRIT Rate 70% or higher
  • CRIT DMG 160% or higher
  • ATK 3000 - 3500
  • SPD 101 or 135+

Even though she walks the Path of Nihility, Acheron plays as a pure DPS, leaning on CRIT Rate and CRIT DMG to deal her damage.

SPD Boots are excellent on Acheron because extra turns let her stack more Slashed Dream Cries. SPD Boots also help when you need to reach the speed thresholds required by certain Planar Ornament sets. That said, ATK% Boots also work if Acheron is paired with Sparkle or Bronya.

For the Planar Sphere you can pick either Lightning DMG or ATK%, whichever piece has the better substats. ATK% is slightly ahead because Acheron already carries a lot of DMG buffs from her Talent and her Light Cone.

Acheron Skill, Trace and Eidolon Upgrade Priority

Skill Priority

tuyệt kỹ acheron Slashed Dream Cries in Red biểu tượng thiên phú acheron Atop Rainleaf Hangs Oneness biểu tượng chiến kỹ acheron Octobolt Flash biểu tượng tấn công thường acheron Trilateral Wiltcross

Trace Priority

vết tích acheron bậc 6 Thunder Core vết tích acheron bậc 4 The Abyss vết tích acheron bậc 2 Red Oni

Eidolon Priority

tinh hồn acheron 2 Mute Thunder in Still Tempest tinh hồn acheron 4 Shrined Fire for Mirrored Soul tinh hồn acheron 6 Apocalypse, the Emancipator

Acheron Skills

Basic ATK

Trilateral Wiltcross

[Single Target]
Energy Generated20
Toughness Break Single Target: 10

Deals Lightning DMG equal to 140% of Acheron’s ATK to one designated enemy target.

Lv. 10

Upgrade Materials

Lv. 1 to Lv. 10

Octobolt Flash

[Blast]
Energy Generated30
Toughness Break AoE: 20

Gains 1 point(s) of “Slashed Dream.” Inflicts 1 stack(s) of “Crimson Knot” on one designated enemy target, dealing Lightning DMG equal to 200% of Acheron’s ATK to this target, as well as Lightning DMG equal to 75% of Acheron’s ATK to adjacent targets.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Slashed Dream Cries in Red

[AoE]
Energy Generated5
Toughness Break Single Target: 30 / Blast: 15

Sequentially unleash “Rainblade” 3 times and “Stygian Resurge” 1 time, dealing Lightning DMG up to 446% of Acheron’s ATK to one designated enemy target, as well as Lightning DMG up to 360% of Acheron’s ATK to other targets.
“Rainblade”: Deals Lightning DMG equal to 28.8% 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 18.0% 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 72.0%.
“Stygian Resurge”: Deals Lightning DMG equal to 144% of Acheron’s ATK to all enemies and remove all “Crimson Knots.”
“Crimson Knot” cannot be applied to enemies during the Ultimate.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Atop Rainleaf Hangs Oneness

[Enhance]
Energy Generated5

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 25%, 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.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Quadrivalent Ascendance

Energy Generated20

Immediately attacks the enemy. At the start of each wave, gains Quadrivalent Ascendance, dealing Lightning DMG equal to 200% of Acheron’s ATK to all enemies and reducing Toughness of all enemies irrespective of Weakness Types. When breaking Weaknesses, triggers the Lightning Weakness Break effect.
Quadrivalent Ascendance: After using the Ultimate, Acheron gains 1 point(s) of Slashed Dream and inflicts 1 stack(s) of Crimson Knot on a single random enemy.
If attacking a normal enemy, immediately defeats them without entering combat. When not hitting enemies, no Technique Points are consumed.

Acheron Traces

Total Trace Bonuses
  • ATK% +28%
  • CRIT DMG +24%
  • Lightning DMG +8%

Acheron Eidolons

Silenced Sky Spake Sooth
Eidolon 1

When dealing DMG to debuffed enemies, increases CRIT Rate by 18%.

Mute Thunder in Still Tempest
Eidolon 2

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.

Frost Bites in Death
Eidolon 3

Ultimate Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.

Shrined Fire for Mirrored Soul
Eidolon 4

When enemy targets enter combat, inflicts them with the Ultimate DMG Vulnerability, increasing the amount of Ultimate DMG they take by 8%.

Strewn Souls on Erased Earths
Eidolon 5

Skill Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.

Apocalypse, the Emancipator
Eidolon 6

Increases the All-Type RES PEN for the Ultimate DMG dealt by Acheron by 20%. The DMG dealt by Basic ATK and Skill will also be considered as Ultimate DMG and can Reduce enemy Toughness regardless of Weakness Types. When breaking Weaknesses, triggers the Lightning Weakness Break effect.