>>77248541If I were to make Suisei a party member of sorts, I'd make her a bard.
I like the idea of Battle Maid Suisei, although I think I'd rather give that to Aqua since I like the idea of "hyper-competent but only in a fight" as a way to translate "Mad Dog Aqua" into a story. Suisei better fits the "one-man army/swiss army knife" battlemaid archetype though.
Personally, I'd make Suisei a kind of vessel or aspect of a Goddess or Stars ala Moona and Hoshinova.