- "Hi, my name's Yu, I come from the nearby town, but I like to play here a lot."
- — Yu, Doubutsu no Mori (film)
Yu (ゆう, Yū) is one of the main characters in Doubutsu no Mori (film), being the only male human. Yu changes his outfit daily; throughout the film, he dressed as a ninja, a pirate, in camouflage, and as a snow bunny. He seems to be a reference on how in the Animal Crossing series games, a person could connect through Wi-Fi, so players from other towns can come visit their town. He does not live in Animal Village, but visits often. He loves to play with Alfonso by competing for collectibles such as fossils and bugs.
- Yu and Ai's names might be a pun on the English words "you and I."
- Yu's voice actress, Yū Kobayashi, shares his name.