Adaptational Angst Upgrade: Inverted. Clay in the novels came from an abusive household, but this is not the case in the series. Also played straight: in the series, Malcolm killed his mother after biting him, and his father killed himself after assuming Clay was also dead. In the novels, nothing is mentioned about his familys fate after he was bitten.
Badass Beard: A bit scruffy, fitting his rather scruffy demeanor.
On the other hand, as a werewolf from the pack and the one who knows Elenas past he is the Betty. Philip on the otherhand is a human with no knowledge of her secret life and is a far more dangerous romantic choice, making him the Veronica.
The Big Guy: He's the best fighter among the pack, and generally wants to take things physical against any threat to the pack.
Byronic Hero: Clay is broody and tortured by the things Jeremy has made him do in the name of protecting the pack, and constantly struggling to find a balance between his better nature, and his total loyalty to Jeremy.
Genius Bruiser: He's big, ridiculously toned, and the acknowledged champion at hand-to-hand combat among the werewolves. He's also Dr. Danvers, professor of anthropology.
Badass Beard: Neater than Clay's, as is the rest of his appearance.
Big Good: Once upon a time, he and Antonio fought their way up the ranks of the Mutts in order to force them to accept Pack rules. They still enforce those rules, to the death.
Cultured Badass: In a backwoods Canadian kind of way. He's an artist by trade, he dresses well, he lives in a big fancy house, and he's very polite when he's not ordering executions. Or even when he is.
Big Damn Heroes: LeBlanc tries to stab Elena, only for Karl to catch his arm and throw him into some glass.
Karl: Its not because shes a prize. Its because shes a lady!
Butt-Monkey: In the third season. He gets captured, beaten (twice) and is killed by the Russian pack in the beginning of the finale.
The Charmer: He can be quite charming when he wants to be.
Chronic Backstabbing Disorder: When he was a mutt, he only looked out for himself and was willing to play the long con to get what he wanted from someone, then betray them when they were no longer of use to him. He stops doing this when he joins the Pack, but briefly gets accused of it by Clay in "Bad Dreams" when he tails the Spanish alpha and sees Karl talking to him.
Even Evil Has Standards: Eventually, LeBlancs attitude (and his vendetta against Elena) combined with Daniels obsession with Elena crosses enough lines that Karl decides hes had enough of both of them.
Face Death with Dignity: He stops Elena from defending him to Jeremy, doesnt protest when Daniel brings up the deaths he is responsible for, and says that all he asks for is a swift death. Jeremy is merciful to him instead, to his visible surprise.
Noodle Incident: When explaining the hierarchy of Romans pack to Nick and Jeremy, he mentions that he met Konstantin two years earlier while trying to steal money from the niece of a Russian oligarch.
Only Sane Man: Fills this role among the mutts. He is quick to point out that attacking Stonehaven with only four mutts would be a suicide mission.
Even Evil Has Loved Ones: His girlfriend, Amber, who he wants to someday settle down and raise a family with. He is forced to take her off of life support after she is bitten and left brain-dead with no hope of recovery.