Peasuke Soramame

空豆 ピースケ

Taro's little brother who always wears an animal hat. At one point, he saved a girl named Hiyoko from a beetle. Of course, this wouldn't have been necessary if not for Arale; when she saw that Peasuke had fallen in love with a girl much taller than he, she used the Big-Small Gun to shrink Hiyoko to insect size.