Shiki Iseya is one of the Idols available to produce at 315 Productions. He is a member of the Idol Unit, High×Joker. He was the vocalist for his Light Music Club band with Jun Fuyumi, Natsuki Sakaki, Hayato Akiyama, and Haruna Wakazato. He is a very energetic boy who loves to sing and loves his high school buddies, so rather than going their separate ways after graduation, Shiki intends to mastermind their debut as an idol unit. He also tends to add "honkii" or "mega" to any descriptor he uses, and ends all of his sentences with す（ssu). He's not the best at academics, so he studies with his buddies a few days before exams.