Sang

A human girl searching for something at the Demon school Hades--ultimately to find a mysterious ring. She has amazing leaping abilities, and she is a master of escape. Later we learn that Sang already has a few rings on her fingers, but instead of giving her power they seem to act like limiters for her and each time she takes one off, she ends up with a different personality and different abilities and skills. She has four different personalities, her first personality is the one you see in volume one when she looks for Olympus. She seems to have a few magical abilities and a weird personality. Her second personality is an older woman who seems to be more powerful, the third is a half crazy man with a lot of fire power. The last is a subtle man who seems to use more quiet magics like telekinetic powers and tiny marble like energy spheres. They are all wizards and are fully aware of each other. Despite being turned into a vampire by Mordicus in Volume 1, she appears human in later volumes. She even loses her fangs.