Pernilla — Epic Seven Dark Warrior: RTA Build, Counters & Win Rate

Pernilla is a 3-star Dark Warrior built as a single-target support-attacker who pairs with Ragnvald. Her sword strikes hit one enemy and can lower Defense, and when Ragnvald is on the team her basic attack pulls him in for a follow-up Dual Attack. Her cooldown skill cleanses two debuffs off both an ally and herself and lays down an Attack-scaling barrier; targeting Ragnvald with it hands her an extra turn and extends her own buffs by one turn. Her third skill is a single-target strike that can slow a target down, but she is slow herself and has no passive, so her tempo depends entirely on the Ragnvald pairing.

Counters

Debuff-reliant control comps — Her cooldown skill clears two debuffs at once from both an ally and herself, so teams that win by piling on debuffs, damage-over-time, slows, or stuns watch their setup stripped away before it matters.
Sustained-damage enemies once she shields — The Attack-scaling barrier she grants lasts two turns and absorbs incoming hits, blunting chip damage and burst against the protected ally.
High-Defense bruisers — Her sword attack can lower a target's Defense for two turns, softening tanky front-liners so her team's follow-up damage lands harder.
Fast threats she can pin — Her third skill can reduce an enemy's Speed for two turns, dragging a fast attacker behind in the turn order.

Countered by

Cleanse and dispel teams — Her value lives in the Decrease Defense she applies and the barrier she grants; an enemy cleanse removes her Defense break, and dispel or buff-steal rips off the barrier she just paid a five-turn cooldown to set up.
Buff-duration shortening — Her standout tempo trick is extending her own buffs by a turn off Ragnvald, so anything that shortens enemy buff durations directly undoes that advantage and shrinks her barrier window.
Immunity holders — Her offense leans on landing Defense and Speed reductions; an enemy under immunity simply ignores both, leaving her sword hits as bare single-target damage.
Forcing fights without Ragnvald or racing her speed — Without Ragnvald she loses the Dual Attack, the extra turn, and the buff extension, collapsing to a slow single-target attacker; at 101 Speed and with no passive, faster teams act first and her long five and six turn cooldowns leave gaps.

counterSetsuka59%

counterLone Wolf Peira54%

Skills

S1Skyward Slash

Attacks the enemy with a sword, with a X chance to --decrease Defense-- for 2 turns. When Ragnvald is on the ally team, triggers a Dual Attack from Ragnvald.

Soulburn −10 soulsIncreases effect chance to 100%.

S2Coldhearted JudgmentCD 5

Dispels two debuffs from the target and the caster and grants a barrier for 2 turns. Barrier strength increases proportional to the caster's Attack. If the target was Ragnvald, grants an extra turn to the caster and extends the caster's buff durations by 1 turn.

S3ChaseCD 6

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