Gaston is a character from Beauty and the Beast (1991 film), a Disney animated film.
He desires Belle.
Not much is known about his background. He's implied to have grown up in the town that Belle and Maurice live in and has garnered a positive reputation with the townsfolk.
Gaston has been infatuated with Belle for an unspecified amount of time. Around the start of the movie, he decided that he was going to marry her. When Belle turned him down, he became angry and insisted that he was going to marry her no matter what. In order to get Belle to marry him, he planned to have Maurice committed in an asylum. When things didn't go his way and he instead found out that Belle loved someone else, he locked Belle and Maurice in their basement and rallied up the town so that he could kill the Beast.