Sean

Sean is one of Leela's ex-boyfriends who never made an appearance in the show or one of the comics until "Fry and Leela's Big Fling". Leela has, however, mentioned him several times before this. He is known to be uneducated, unambitious, pasty and hunched, but with an incredible, beautiful creative soul, and musical talent. Sean is now married to Darlene, a girl he met at the 99¢ store.

Biography
At an unspecified time prior to Fry's arrival in the future, Sean was in a romantic relationship with Leela. Though it is uncertain how the two met, Sean evidently wooed Leela by looking her in the eye and sadly saying, "I've never been so happy", a tactic Leela was unaware of until Fry later explained the technique to her.

Though Sean was both uneducated and unambitious, as well as physically pasty and hunched, Leela still remained attracted to him because of his talent at playing music on his saxophone. Leela would listen to Sean play improvised sax for hours as he sat naked on her couch. However, Sean and Leela's relationship turned sour later on when she found someone else's couch fibres on his butt; evidence that he had been playing naked Saxophone for another woman.

Though Leela claims that their breakup was a mutual decision, Sean would go on to say that Leela was crazy and he dumped her.

Trivia

 * Sean had the same reed in his sax for 20 years before Fry broke it.
 * In, David X. Cohen seems to say that he just looked up Sean, possibly referring to this wiki.