AcheronNihility
A drifter claiming to be a Galaxy Ranger. Her true name is unknown, and she walks the cosmos alone, carrying with her a long sword. Though aloof and taciturn, her blade flicks out like lashing lightning. And yet, she always strikes with her scabbard, never drawing the sword free.

Combat Skills & Talents
Traces and active battle commands
Trilateral Wiltcross
Deals minor Lightning DMG to one enemy.
Octobolt Flash
Gains #3[i] point(s) of Slashed Dream. Inflicts #3[i] stack(s) of Crimson Knot on one enemy, dealing Lightning DMG to this target, as well as minor Lightning DMG to adjacent targets.
Slashed Dream Cries in Red
Deals 3 hits of minor Lightning DMG to one enemy. If "Crimson Knot" is removed from the target, then deals minor Lightning DMG to all enemies. Finally, deals 1 hit of Lightning DMG to all enemies and removes all "Crimson Knots."
Rainblade
Deals minor Lightning DMG to one enemy, and removes up to 3 stacks of "Crimson Knot" from the target. When "Crimson Knot" is removed, deals minor Lightning DMG to all enemies 1 time, with this DMG multiplier increased for every stack of "Crimson Knot" removed.
Rainblade
Deals minor Lightning DMG to one enemy, and removes up to 3 stacks of "Crimson Knot" from the target. When "Crimson Knot" is removed, deals minor Lightning DMG to all enemies 1 time, with this DMG multiplier increased for every stack of "Crimson Knot" removed.
Rainblade
Deals minor Lightning DMG to one enemy, and removes up to 3 stacks of "Crimson Knot" from the target. When "Crimson Knot" is removed, deals minor Lightning DMG to all enemies 1 time, with this DMG multiplier increased for every stack of "Crimson Knot" removed.
Stygian Resurge
Deals Lightning DMG to all enemies and removes all Crimson Knots.
Atop Rainleaf Hangs Oneness
When Slashed Dream reaches its upper limit, the Ultimate can be activated. During the Ultimate, reduces enemies' Toughness regardless of Weakness Types and reduces all enemies' All-Type RES. When any unit inflicts debuffs on an enemy target while using their ability, Acheron gains Slashed Dream and inflicts Crimson Knot on an enemy target.
Quadrivalent Ascendance
Attacks the enemy. At the start of each wave, gains Quadrivalent Ascendance, dealing Lightning DMG to all enemies and reducing Toughness regardless of Weakness Types. If attacking a normal enemy, immediately defeats them without entering combat. When not hitting enemies, no Technique Points are consumed.
Ascension Bonus Abilities
Passive perks unlocked through Ascension 2, 4, and 6
Red Oni
When battle starts, immediately gains #1[i] point(s) of Slashed Dream and applies #1[i] 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 #2[i] time(s).
The Abyss
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 #1[i]% or #2[i]% of the original DMG respectively.
Thunder Core
When the Ultimate's Rainblade hits enemy targets that have Crimson Knot, the DMG dealt by Acheron increases by #1[i]%, stacking up to #2[i] time(s) and lasting for #3[i] turn(s). And when Stygian Resurge triggers, additionally deals DMG for #4[i] times. Each time deals Lightning DMG equal to #5[i]% of Acheron's ATK to a single random enemy and is considered as Ultimate DMG.
ATK Boost
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CRIT DMG Boost
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ATK Boost
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DMG Boost: Lightning
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ATK Boost
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CRIT DMG Boost
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ATK Boost
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DMG Boost: Lightning
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CRIT DMG Boost
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ATK Boost
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Eidolon Resonances
Duplicate character warp unlocks from Rank 1 through Rank 6
Silenced Sky Spake Sooth
When dealing DMG to debuffed enemies, increases CRIT Rate by #1[i]%.
Mute Thunder in Still Tempest
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
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
When enemy targets enter combat, inflicts them with the Ultimate DMG Vulnerability, increasing the amount of Ultimate DMG they take by #1[i]%.
Strewn Souls on Erased Earths
Skill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Apocalypse, the Emancipator
Increases the All-Type RES PEN for the Ultimate DMG dealt by Acheron by #1[i]%. 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.
Ascension Materials
10 farming resources with exact step-by-step quotas
Lore & Background
A drifter claiming to be a Galaxy Ranger. Her true name is unknown, and she walks the cosmos alone, carrying with her a long sword. Though aloof and taciturn, her blade flicks out like lashing lightning. And yet, she always strikes with her scabbard, never drawing the sword free.
<i>"...Warriors don't choose their blades, but rather their blades choose them. ██████████████████████████████████████████████████████████████████████████... On that day, as I witnessed the blade I had crafted being passed on to that girl, I realized that in the fight against ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇, she had chosen — or been chosen — to embrace the path that ▇▇▇▇▇▇▇▇▇ led her toward a new tomorrow. ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ there would be a bright future. Despite the peril looming over Izumo, its people would hold onto hope, believing that the ▇▇▇▇▇▇▇▇▇ shall one day be vanquished, and the world shall be liberated... ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇..."</i> <align="right">— An Ancient Scattered Manuscript</align>
<i>"...Through the scrolls left behind by the blade forger, we have learned that Izumo was once on the brink of destruction. In order to survive, they forged blades from the ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇, and those who wielded them were hailed as the saviors of their realm. Unfortunately, the world has long vanished from the astral charts. The truth of history eludes us, and the Remembrance no longer exists. When the Armed Archaeologists arrived, the galaxy resounded solely with the melody of the Enigmata: ▇▇▇▇▇▇▇▇▇▇ tears, rain's boundless outpour. Beneath faint curtain, the survivor departs from her shore. Her homeland, ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇..."</i> <align="right">— Oppenheimer, the Recorder</align>