Bald Yosuke

Bald Yosuke was actually not born bald. He had hair until he was 4 days old, when Mii Chie had shaved his head. This is one of his motives for aiming for Mii Chie's demise. He never fully wanted to go after Mii Chie until her and her friends pushed him into a Minecraft ravine and he lost his diamonds. He had returned to the scene to collect his treasures, but found out that Mii Chie had stolen them. This is why he travels day and night to find and kill Mii Chie for once and for all, and get his diamonds back.