Cassios is a B-rank support with a taunt/protection kit and inconsistent defense buffing. He is purely a collection unit with minimal practical use at any game stage, as B-rank units fall far behind even budget A-rank alternatives in stats and utility.
His kit is like… what we saw in the Leo temple. A Common Hatred provides targeted taunt coverage for low-HP allies at a reasonable activation threshold, so once more Cassios is giving his life for a team mate. Again.
Overall, Cassios is purely a collection entry with no practical role. Even in complete beginner lineups where every unit is underdeveloped, investing in a single A-rank unit will instantly outvalue any B-rank roster, so his existence is primarily for album completion rather than meaningful gameplay.
