Gaku wears the default school uniform with the jacket open revealing a red shirt with a phoenix on it. He carries a weapon box on his back, containing a crowbar in it. He also wears two lobe ear piercings on his left ear. He has short, spiky, dark blond hair with the tufts meeting in both directions, and red eyes with a brownish hue framed by thin, oblique eyebrows. He has a scar located in the middle-left of his forehead.