Chrysaor Krishna is one of Poseidon’s Marine generals, a unit that came out at the start of the game and currently has no place in the meta, although it does have some interesting features. His kit revolves around Glare Seal and Chakra lock: Skill 1 applies Glare Seal to a single target, while Great Light (1 energy) deals low AoE C.DMG and can spread Glare Seals across the enemy team. Skill 3 adds a chance to occlude Seven Chakras, and the Awakened Skill 4 can permanently block them if the target already has Glare Seal, plus apply an ATK/Speed reduction when the enemy’s Cosmo is disabled.
In practice, all of this is too conditional and too inconsistent for modern teams, and once he has used his control tools he brings almost no pressure or utility outside that niche. It sounds useful, and in theory it is, but he cannot do much else beyond this, which greatly limits his value in the game. He might as well be an A-unit.