Yuu Oosumi

Oosumi is the president of the karate club, and a persistent president at that. He often comes after Yuzu to get him to join due to his height (or is it?). He's terrible with lying and often accidentally slips up saying what his true intentions are and then quickly trying to cover them up. He also doesn't seem to understand the meaning of "No" when it comes to ensnaring Yuzu into the karate club or other questionable activities.