Izumi is an honor student who runs against Adachi for the student council president position. Like Adachi, he is a former delinquent who changed himself in order to focus more on his studies, with his grades ranking second in the entire grade. He was known as a legendary fighter during his biker gang days so Izumi considers himself number one in fighting already. Though he is the first person in the manga shown to be capable of blocking Adachi's kick (using all his might), he still lost to her swiftly. He decides to become the vice president instead after losing to her in a fight. He shares his position with Shinagawa resulting in the two often fighting over who is the better vice president. He gets really hyped up over the smallest things and still loves to wear his old gang outfit. He's shown to be sensitive about his short height, being the shortest male of the group, only barely taller than the girls. Four years later, he is shown to be studying law.