Bob

He is the butterflies. His humanoid form is made up of them. It’s a supernatural entity hivemind kinda thing. "hurr durr I'm evil why are you being friendly to me" He constantly manipulates Lys with his butterflies and they can even do magicky stuff, like making her drowsy or influence her into not caring etc etc, and can also shield from and negate spells. He wants to be taken seriously but Lys really doesn't, she treats him like a friend. She called the butterfly on her eye Bob so she transfered the nickname to him, he doesn't have a name beyond his fancy title. "Bob... I've never heard of that name, has a mysterious ring, I like it." He ends up caring for Lys & joining the cast in dumbassery shenanigans

His powers still have limits, negating a curse as strong as kysgoroth's means he suffers some of its effects, sharing the curse to make it easier on him instead of eliminating it. His bangs hide the ugly consequences of it.