Haruka Isumi

Haruka Isumi (亥清 悠, Isumi Haruka) has a sweet face, but behind that he won’t acknowledge those who won’t acknowledge him. He’s a self-centered high school student who attends the same school as Iori Izumi and Tamaki Yotsuba. ZOOL’s vocalist and double centre.

He is considered to be the 'failed experiment' by Kujo Takamasa, who taught him to treat his audience as poison and devalue them. He was abandoned after Tenn Kujo's rise as an idol and sent back to Japan.

This resulted in him growing a deep hatred of both Kujo and Tenn, which led to Ryo Tsukumo recruiting him into Tsukumo Productions and eventually ZOOL.