Shepherd Jena — Epic Seven Ice Mage: RTA Build, Counters & Win Rate

Shepherd Jena is a 3-star Ice Mage built entirely around enemy control and tempo denial. Her basic attack can stun a single target for one turn, her second skill weakens the whole enemy team by stripping a turn off all their buffs while inflicting Freeze and granting her an extra turn, and her third skill hits everyone with frost magic for Decrease Defense and then knocks back enemy Combat Readiness by a random 20% to 40%. She has no passive and no self-buffs, so all of her value comes from locking enemies down, dragging back their turns, and softening them up for allies.

Counters

Teams that rely on stacking and holding buffs — Her second skill shaves a turn off every buff on the enemy team and Freezes them, gutting setups that depend on layering Attack, Defense, or speed buffs to snowball.
Fast cleave and one-shot openers — Her area attack knocks enemy Combat Readiness back by 20% to 40% and her stun and Freeze deny turns, stealing the tempo from teams that want to act first and burst you down before you move.
Bulky defensive frontlines — She applies Decrease Defense to the whole enemy team for two turns, so high-defense walls fold much faster under her allies' follow-up damage.
Single dangerous threats that need to be shut off — A 35% stun on her cheap basic attack plus Freeze from her weakening skill can lock down a key carry, keeping it from taking the turn it needs to act.

Countered by

Cleanse — Her entire kit is debuffs (stun, Freeze, Decrease Defense, Combat Readiness down). A teammate that removes negative effects can wipe her control off the enemy team and leave her with no lasting pressure.
Effect resistance and immunity — All of her control hits with a chance to land and the description shows no guaranteed application, so high resistance shrugs it off and any buff that blocks debuffs makes her stun, Freeze, and defense break do nothing.
Long cooldowns and a weak basic — Her real control sits on a 4-turn and 5-turn cooldown, and between them she only has a single-target attack with a coin-flip stun, so once those skills are spent she goes quiet and can be punished.
As a 3-star, fragile and stat-starved — With no passive and no defensive tools of her own, she dies quickly to focused damage before her control rotations come back up.

counterNotos61%

counterIvana54%

counterLionheart Cermia53%

counterAram60%

counterInfinite Horizon Achates55%

Skills

S1Cold Blow

Attacks with a staff, with a 35% chance to --stun-- for 1 turn.

S2CoerceCD 4

Casts weakening magic, with a X chance each to decrease buff durations of all enemies by 1 turn and inflict --frostbite-- for 2 turns.

Soulburn −20 soulsGrants an extra turn.

S3Punishing LightCD 5

Attacks all enemies with frost magic, with a X chance to --decrease Defense-- for 2 turns before a X chance to decrease Combat Readiness by a random amount between 20% and 40%.