┏━━━───•

Necromancer

•───━━━┛

┏━━━───•

Mage

•───━━━┛

┏━━━───•

Mage

•───━━━┛

Most applicable : Mascot
More common : Tank
There are classes like mascot in certain games and they tend to wear costumes but for a more common rpg class i would say a tank due to the shell acting as armor, even tho tank is more a role than a class it can be a class.

┌── R A X T O N ──┐
─ ──┤█║█│█║▌█╟── ─

Thief?

Thief because it stole that melon!

┌── R A X T O N ──┐
─ ──┤█║█│█║▌█╟── ─

Engineer

┌── R A X T O N ──┐
─ ──┤█║█│█║▌█╟── ─

Dancer

┌── R A X T O N ──┐
─ ──┤█║█│█║▌█╟── ─

Archer