Acheron Profile, Skills, Traces and Eidolons

Introductions

Acheron is a 5★ character with the Lightning element who follows the Path of 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.

Skills

Basic ATK

Trilateral Wiltcross

Single Target

Lv. 6

Energy gain: -

Break: Main: 10.0

Deals Lightning DMG equal to 100% of Acheron's ATK to a single target enemy.

Skill

Octobolt Flash

Blast

Lv. 10

Energy gain: -

Break: Main: 20.0 / AoE: 10.0

Gains 1 point(s) of Slashed Dream. Inflicts 1 stack(s) of Crimson Knot on a single target enemy, dealing Lightning DMG equal to 160.0% of Acheron's ATK to this target, as well as Lightning DMG equal to 60.0% of Acheron's ATK to adjacent targets.

Ultimate

Slashed Dream Cries in Red

AoE | 9 energy cost

Lv. 10

Energy gain: -

Sequentially unleash Rainblade 3 times and Stygian Resurge 1 time, dealing Lightning DMG up to 372.0% of Acheron's ATK to a single target enemy, as well as Lightning DMG up to 300% of Acheron's ATK to other targets.

Rainblade: Deals Lightning DMG equal to 24.0% of Acheron's ATK to a single target enemy and removes up to 3 stacks of Crimson Knot from the target. When Crimson Knot is removed, immediately deals Lightning DMG equal to 15.0% 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 60.0%.

Stygian Resurge: Deals Lightning DMG equal to 120.0% of Acheron's ATK to all enemies and remove all Crimson Knots.

Crimson Knot cannot be applied to enemies during the Ultimate.

Talent

Atop Rainleaf Hangs Oneness

Enhance

Lv. 10

Energy gain: -

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 20.0%, 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.

Technique

Quadrivalent Ascendance

Technique

Energy gain: -

Break: Main: 20.0

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.

Major Traces

Red Oni

Major trace

When battle starts, immediately gains 5 point(s) of Slashed Dream and applies 5 stack(s) of Crimson Knot to a random enemy. When Slashed Dream reaches its upper limit, for every point of Slashed Dream that exceeds the limit, gains 1 stack of Quadrivalent Ascendance. Enables Quadrivalent Ascendance to stack up to 3 time(s).

The Abyss

Major trace

When there are 1 or 2 Nihility characters other than Acheron in the team, the DMG dealt by Acheron's Basic ATK, Skill, and Ultimate increases to 115.0% or 160.0% of the original DMG respectively.

Thunder Core

Major trace

When the Ultimate's Rainblade hits enemy targets that have Crimson Knot, the DMG dealt by Acheron increases by 30.0%, stacking up to 3 time(s) and lasting for 3 turn(s). And when Stygian Resurge triggers, additionally deals DMG for 6 times. Each time deals Lightning DMG equal to 25.0% of Acheron's ATK to a single random enemy and is considered as Ultimate DMG.

Minor Traces

ATK

+28.0%

CRIT DMG

+24.0%

Lightning DMG Boost

+8.0%

Eidolons

Silenced Sky Spake Sooth

Eidolon 1

When dealing DMG to debuffed enemies, increases CRIT Rate by 18.0%.

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 8.0%.

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 20.0%. 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.

Stats and Ascension Materials

Lv. 1

Base Stats

153

ATK

DEF

SPD

101

Ascension Materials

Credits

308000

Dream Collection Component

Dream Flow Valve

Shape Shifter's Lightning Staff

Dream Making Engine

Acheron Voice Actors

Allegra Clark

Sawashiro Miyuki

Juhuahua

Park Ji-yoon

Shikhu

Staff Author

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This guide has been written by Shikhu (Discord - Shikhu). A long-time Honkai Star Rail player since launch experiencing everything the game has to offer from building his favourite characters to clearing MoC, PF and AS on the regular.