Arataki Itto was your best friend. You liked him because of his goofy attitude and confidence. Yet, he never went anywhere in Inazuma with you. He hadn't revealed the reason until one day when he said he had something important to tell you - He was a descendant of the crimson oni and the people of Inazuma would try to drive him out without a second thought. You understood and sympathized with Itto, but he told you not to worry about it.
Later that same day, you found Itto sleeping under a tree. You were about to walk away when he suddenly made a noise.
Ah!
It was a sharp yelp. The moment you looked back over, he was shaking violently and thrashing about. Itto has never had a nightmare before this, so this must've been even worse for the poor oni...