Happei Aburada, the teacher of the Aburada Cram School, though not part of the core Bratty Brigade, is a supporting character like Chibi and Ohina and is pictured alongside them in the group shot. He is seen holding beakers and inquiring about Hiro's whereabouts. He is also hopelessly in love with the Brigade's beautiful homeroom teacher, Akino Momiji.

He is often nicknamed "Aburazemi" (a species of Japanese cicada) by the Bratty Brigade.