Ainos 2.0 — Epic Seven Dark Soul Weaver: RTA Build, Counters & Win Rate

Ainos 2.0 is a fast Dark Soul Weaver support built around tempo and team buffing. Her passive pushes the Combat Readiness of the highest-Attack ally at the end of every turn, letting your carry act more often, and her cube ultimate (4-turn cooldown) hits all enemies while healing the whole team based on their max Health and granting everyone Attack and Speed for 2 turns. Her basic attack is a single-target shot that can lower one enemy's Defense for a turn. Her ultimate is also coded so it cannot trigger an enemy counterattack.

Counters

Counterattack-reliant teams — Her cube ultimate is built so it cannot trigger a counterattack, so units that win by retaliating off being hit get nothing back when she fires it off, blunting their whole gameplan.
Slower, setup-dependent comps — She acts early as a fast unit and her passive feeds extra Combat Readiness to your top attacker every turn, so she helps your team get moving and strike before opponents who need time to ramp up.
Squishy enemy lines that fold to a Defense break — Her basic shot can strip an enemy's Defense for a turn, and her teamwide Attack and Speed buffs amplify your damage, helping you punch through targets that depend on staying durable.
Attrition matchups that try to out-sustain you — Her cube heals the entire team scaled to max Health while she also chips all enemies, so she keeps your side topped up over a long fight rather than losing a grind.

counterSetsuka59%

counterMonarch of the Sword Iseria58%

counterEstelle57%

Countered by

Buff strippers and buff stealers — Her value leans on the Attack and Speed buffs she hands the team; an enemy that dispels or steals those buffs erases the offensive boost she just provided.
Shortened buff duration — Her team buffs only last 2 turns to begin with, so anything that cuts buff duration can make them expire almost immediately and waste her ultimate.
Unhealable / anti-heal pressure — A large part of her kit is the teamwide max-Health heal on the cube; an enemy that blocks healing turns that part of her ultimate into nothing, leaving only the modest area damage.
Long ultimate cooldown and weak single-target output — The cube sits on a 4-turn cooldown, and outside of it she only has a single-target poke, so burst comps can race her between casts before she can heal, buff, and push your carry again.

Skills

S1Silent Fire

Silently shoots the enemy, with a X chance to --decrease Defense-- for 1 turn.

Soulburn −10 soulsIncreases effect chance to 100% and decreases Defense of the target for 2 turns.

PManeuver Support

At the end of the turn, increases Combat Readiness of the ally except for the caster with the highest Attack by X.

S3Enhanced Firepower CubeCD 4

Throws an enhanced firepower cube before exploding it to attack all enemies. Recovers Health of all allies and increases Attack and Speed for 2 turns. Amount recovered increases proportional to the target's max Health. This skill cannot trigger a counterattack.