Kei is a middle blocker for Karasuno's volleyball club. He's snarky, cynical, arrogant, aloof, and cold - often entering into verbal jousts with anyone who crosses him. He's blunt with his words, and he doesn't sugarcoat it, yet he does care - if yet slightly. He's friends with Yamaguchi and calls him "Yams". He's also nicknamed as "Tsukki". He has short blonde hair, brown eyes, glasses, and he's tall.