Theory:Luke Campbell

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The following fan theories are about Luke Campbell.

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Theories

Theory	Citations	Notes
Luke is Sylar's half-brother.	None.	• Luke's father's name is unknown. + Luke seems to know an awful lot of truthful and accurate information about Sylar's real father, even that he sold Sylar as a boy. Such a confession may have been Luke's father attempting to come clean. - They don't even look alike. + Peter and Nathan looks nothing alike, but they are brothers. + Siblings don't have to look alike. + Luke was told some very personal things from Sylar's father, possibly signifying that Luke is another son.
Luke will be killed by Sylar after he leads Sylar to his father.	None.	+ Sylar's hunger has proven to be stronger than his emotions in the past. + Sylar has killed everyone close to him e.g. Elle and his mom. - Sylar has already shown self-control in sparing Luke, and even his mother in Trust and Blood, even though he believed neither of them were any use to him. It is possible that he can exercise this self-control again when Luke ceases to be useful, especially if he develops some sort of emotional bond with Luke.
Luke will become Sylar's apprentice.	None.	+ Promotional articles referring to Luke have always heavily hinted, if not said outright, that he will become Sylar's apprentice. + Without Luke's character for interaction, Sylar would have no reason to still be on the show. The 'searching for the disappeared dad' bit was done in Volume 2 with Matt and Maury; Sylar's heel face revolving door antics in Volume 3 have worn his popularity down considerably. As a character, he can't afford to kill Luke. - Maybe Sylar's popularity would go up if he killed Luke?
Luke will kill Tracy.	None.	+ Luke showed little hesitation in killing Daniel Simmons. + His ability is a perfect counter for hers. + Ali Larter wants out of the show; this is a way. - Ali Larter said in an interview that those rumours were false. She does not want off the show, and the writers have said that they have a big story arc waiting for her in Season 4. - Luke and Tracy don't have any character connections whatsoever except for their abilities being opposite from each other. - Luke has no reason to kill Tracy.
Luke likes Sylar as more than a friend.	None.	+ Luke always smiles when he sees Sylar. + Luke put his life at risk to protect Sylar. + Sylar put his life at risk to protect Luke. - Sylar had an intimate relationship with Elle Bishop. - It is unlikely that the writers will introduce a homosexual relationship in the series, much less one involving Sylar.