ASSR Awakened Seo Yoon

Awakened Seo Yoon is a top-tier damage dealer that dominates the battlefield by sheer presence. Her gimmick is that she can summon rifles that are Snipers while she is a Ranger, so you get two different damage dealers in one.

This makes her a force of nature in PVE because she can abuse the Role Advantage bonus due to being two different unit types in one. Furthermore, she's quite hard to kill thanks to her rifles - they take any damage instead of her - and jumping backward away from the action when her HP falls below a certain threshold.

In the early game, just deploying ASY behind a tank is enough to safely clear most stages in story mode as she will kill everything that tries to harm her. Together with Awakened Yuna, she forms a duo that can easily clear the whole Shadow Palace (except for stages where awakened units are banned), and in Raids and Guild Coop she often tops the damage meters. As for the late game, while she is often used as a support employee in Dive 50, there's no place for her in Relic Dungeons. While you can use her there in one of the three endgame Dungeons, if she's your only awakened unit, she's useless in the other two.

In PVP, while her damage is also scary, she's feared because of her ability to turn healing skills used by enemies against themselves. She places a debuff on any enemy hit by her special and whenever they are healed they got damaged instead.

Still, nowadays she's not as good as she was because of Spira that can follow her when she jumps back to safety and murders her, and because of Replacer King who instantly wipes her Rifles, leaving her defenseless. While she is commonly used in lower tiers, in high elo she only comes back into the meta when most other awakened units are banned.