由由是个圆眼睛、圆脸蛋、长着一只圆鼻头的小姑娘。由由爱幻想，又好奇，脑袋里有跑马，手脚闲不住，就常常惹出点小麻烦，这些小麻烦令人哭笑不得，瞠目结舌。但是，请不要责怪小由由吧，因为她惹下这些小麻烦的时候，还是一个小人儿呢！(Youyou is a girl with round eyes, round face, and a round nose. Filled with fantasy and curiosity, and dynamic thinking in her head, she wants to be active at any time, so she often makes up small troubles, surprising people sharply without knowing how to react to it. However, please don't blame the little girl, for when she makes these little troubles, she is just a little girl!)