Groose
Skyward Sword
Groose appears throughout the game in different ways. He has a thing for Zelda and is determined to win the birdriding competition to impress her. He and his lackeys compete very roughly with Link, and trie to knock him around to prevent him from taking the bird statue first. He also has his lackeys, Cawlin and Stritch throw eggs at Link to slow him down. The ceremony leader specifically warned against this behavior just before the contest began, and the old man singled out Groose as someone who is prone to not play by the rules. He will probably be trying to rescue Zelda before Link does, but it isn't known whether he will be a help or a hindrance to Link's quest.
He is similar to Mido as both pick on Link because they are jealous of someone Link likes.