One of Sawas classmates and Rans closest friends. He is Rans best friend and is one of the firsts to be aware of Sawa and Rans relationship. He was in the basketball club with Ran and Kido until the third quarter of their second year of middle school. Tsubaki is very caring of Akira. In an omake Akira reveals that he has two older sisters it was inside her notepad of research. He is number two on the list of people Akira cant handle right behind Sawa. Tsubaki wears round glasses.