Larsa
Larsa is the younger son of House Solidor and a princely figure who sympathises with Dalmasca. He fights alongside the party as a guest at several points in the story.
As a guest, Larsa is controlled by the game’s AI and cannot be equipped or directed like a full party member. He uses healing items freely, so it is usually best to let him act on his own while you focus on your main three characters.