Inui is a boy with a stoic and quiet personality, showing his opinions without worrying about hurting others. In the past he got the burn after a "meteor" fell near him. Soon he realizes that it was not a meteor but the fire demon. He ends up making a pact with him, unintentionally uniting their souls (if Koko dies soon he dies too) Akane, his sister died of an illness. He also has a curse that he got from a witch after rejecting her: If he loves someone he go back to her.