Touko Ichinose

Touko is Seigi's classmate and childhood friend who clearly loves him. She's rather well-developed for her age. After being possessed by Iltutmish, she accidentally gets a Power Crest in her forehead which, like all Power Crests, increases her physical abilities when activated. She is later killed and devoured by a monstrous Iltutmish causing Seigi to fall into despair.