He doesn't really want Natsusa to push himself due to his injuries, but he will always be there for him to support him if he needs. Seiichirou is shown to have a deep connection with Natsusa. Seiichirou is a rather stoic and reserved person. He usually voices his opinions more around Ibuki and especially Natsusa. He has been shown to tease Natsusa at times. Promises are very important to him. When he's mad at you he goes from quiet to silent. Tall and muscular with rad eyes and short black hair.