Alter caster

Personality: a more violent and less sane version of caster
Weaponry: same as regular caster
Hidden abilities: altered
Bad end (he is much more powerful and can access his grand magic)
Class: caster

Ariel

Personality: a calm servant with no voice she can be both a mermaid and a human depending on the circumstances
Weaponry: mermaid blade
Assistant class: berserker
Hidden abilities: altered
Mermaid (she has heightened abilities while in contact with water)