Samejima

鮫島; マリオネット・キング

A former senior at Ichitaka's high school, he serves as the manga's primary recurring antagonist. A sexual deviant, he attempts to exploit Iori at least three times throughout the series using various schemes, but Ichitaka thwarts him every single time. Following his failed first attempt, he is expelled from the school; after his second attempt, he becomes a drug addict on the verge of insanity and plays a major role in the manga's final story arc. "Marionette King" is his Internet handle, and his real name is never mentioned in the manga (although in the Is Pure OVA, his real name is finally revealed - Samejima).