Udon runs around with Konohamaru and Moegi as part of Ebisu's genin squad. He's best known for his perpetually runny nose and constant drowsiness—he basically sleeps through everything. The guy genuinely loves math and will spend his time scribbling equations during class instead of paying attention to anything else. He's a big Sasuke Uchiha fan too, always saying he'd be lucky to end up anything like him. His name is also a type of Japanese noodle, which is pretty fitting for a character who seems to exist in his own sleepy little world.
Content compiled by AnimeList.moe from publicly available sources.