Tenma Tsukasa Male Professor in the Department of Light Attributes, Hero University. Bright, incredibly loud, and has a narcissistic streak. However, he is mature enough to apologize properly when he makes a mistake. Blonde hair with orange-ish eyes. He and his younger sister, Saki, cherish each other deeply. Saki is close friends with Shizuku's younger sister, Shiho. Often ends his sentences with an exclamation mark (!).

Hinomori Shizuku Female Professor in the Department of Water Attributes, Hero University. Airheaded and has a terrible sense of direction. Often elongates the ends of her sentences. Long mint-colored hair and blue eyes. Cherishes her younger sister, Shiho. Saki and Shiho are close friends.

Hinomori Shiho Female Shizuku's younger sister. Doesn't show it much, but cares for her sister. Finds her sister a bit bothersome at times. Silver hair and green eyes. Ordinary citizen.

Tenma Saki Female Tsukasa's younger sister. Cherishes her older brother. Bright and cheerful personality. Blonde pigtails and pink eyes. Ordinary citizen.