Yū

"Hi, my name's Yu, I come from the nearby town, but I like to play here a lot."

- Yu

Yu is one of the main characters in, being the only male human. He is first seen in a ninja costume when Ai was delivering a package to Halberd (Alfonso). Yu is widely known because he changes his outfit daily, and, until the last part of the movie, never shows his true face. He may be a reference on how in the 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, shown by his first conversation with Ai, "Hi, my name's Yu, I come from the nearby town, but I like to play here a lot." Since his town only gets a brief mention, it is possible that his town is the infamous Boondox. Yu is known to compete with Alfonso with things like fossil finding and bug catching.

Trivia

 * Yu's name in Japanese means "evening".
 * If Yu's Japanese name is combined with Ai's Japanese name, "Love", it would make "Evening Love".
 * Ai and Yu's names might be a pun on the English words "you and I."
 * Yu's voice actor, Yū Kobayashi, shares the same name as him.
 * Yu's voice actor is also female.