Lymnades Kayza is an A-rank DPS unit with a gimmick-heavy kit built around copying an enemy's abilities and turning their own strengths against them. He is more of a niche or collection-focused character than a stable meta option, but he can still be interesting for newer players who want a flexible unit with unusual match-dependent value.
At max skill levels, his core identity comes from Hunt of Heart, which lets him permanently transform into a target and gain their skill effects up to level 5, while Weakness Perception guarantees an immediate extra action after the transformation and prevents him from selecting an overly strong protected target. Trap of Heart adds useful setup by marking an enemy and increasing Kayza’s damage against them, with even higher bonus damage when using copied skills. His basic attack is simple, so most of his value depends on choosing the right enemy to copy and taking advantage of the extra action window.
Overall, Kayza can be fun and occasionally effective in off-meta fights where the enemy roster gives him a valuable transformation target, but he is too situational to be a dependable PvP investment. For beginner or budget accounts he offers creative utility and matchup variety, yet in competitive environments he usually loses out to more consistent DPS units with fixed, reliable game plans.