Koro

Koro is a bat familiar that Julia has. She uses Koro has her pet, but Koro is a familiar who can transform form a bat to a familiar. According to Julia Koro is a dangerous familiar and one of her strongest she has. He can kill an whole army of humans, demons, devils and vampires with one blow. Koro's name means unkillable, which is why Julia named him 'Koro".