Serene Purity Adin — Epic Seven Ice Thief: RTA Build, Counters & Win Rate

Serene Purity Adin is a 3-star Ice Thief built as a single-target attacker who supports the team's main damage dealer. Her basic attack can lower one enemy's Defense, and her cooldown skill hits a single target repeatedly with a chance to slow them while speeding herself up. Her passive, Crystal Clear Soul, charges Focus whenever the highest-Attack ally starts a turn; once Focus is full, her next attack consumes it to unleash Glacial Strike, the kit's only multi-target hit, which strikes all enemies with a 50% chance to reduce Defense and hands the team's top attacker the Torrent buff.

Counters

Defense-reliant bruisers and walls — Both her basic attack and her Focus-fueled Glacial Strike apply Decrease Defense, chipping away at tanky targets so her partner's damage lands far harder.
Dodge and evasion-built enemies — Her cooldown skill lowers an enemy's Hit Chance and her kit cuts down evasion, helping ensure attacks connect against slippery dodge units.
Slow-paced, turn-starved enemies — She slows a target with her cooldown skill while raising her own Speed, and her passive accelerates the team's main attacker through Focus and the Torrent buff, letting your side act more often.
A team built around one heavy hitter — She funnels her entire kit into the highest-Attack ally, granting Torrent and stacking Defense breaks so a single carry can punch through the enemy line.

Countered by

Cleanse and effect resistance — Her pressure depends on landing Defense down and Speed down; enemies who cleanse those debuffs or resist them shrug off most of her contribution.
Immunity and buff-stripping — The Torrent buff she grants her carry can be stolen, dispelled, or shortened, and immune targets ignore her Defense breaks entirely, gutting her support payoff.
Burst before her engine spins up — Glacial Strike only fires once Focus is full, which requires the highest-Attack ally to take turns first, so fast aggressive teams can crash in before her one multi-target hit ever comes online.
Single-target ceiling and a cooldown gap — Outside the Focus-gated passive she only strikes one enemy at a time, and her slowing skill sits on a four-turn cooldown, leaving stretches where she applies little pressure to a wide enemy team.

counterRuele of Light59%

counterTori57%

counterSpirit Eye Celine55%

counterSetsuka59%

counterLone Wolf Peira54%

Skills

S1Ankle Cut

Attacks the enemy with a sword, with a X chance to --decrease Defense-- for 2 turns.

Soulburn −10 soulsIncreases effect chance to 100%.

PCrystal Clear Soul

When the ally with the highest Attack starts their turn, gains 1 Focus. After attacking on the caster's turn, when Focus is full, consumes all Focus, activating Glacial Strike. Glacial Strike: Attacks all enemies, with a 50% chance to --decrease Defense-- for 2 turns, and grants Torrent to the ally with the highest Attack.

S3Frozen Winter CutCD 4

Attacks the enemy repeatedly, with a X chance to --decrease Speed-- for 2 turns, and increases Speed of the caster for 2 turns.