James

James is the major antagonist of the first book, Twilight.

History
The major antagonist of the novel Twilight, James is a tracker who enjoys the hunt as a sadistic game. He tends to get "feelings", a sort of "sixth sense", about his quarry's whereabouts, which aid him in the hunt. Though it's never explicitly stated, perhaps this was the ability he brought over from his human life. He has hardly ever lost his quarry, except in one case (Alice Cullen) where his prey was turned into a vampire before he could attack her. Unlike the Cullens, he drinks human blood as his food source. He met his demise at the end of Twilight, where, after tricking Bella Swan into a trap at her old ballet studio in Phoenix, he brutally attacked and almost killed her. He bit her hand right before he was destroyed by Emmett Cullen, who ripped his body into pieces and burnt the remnants.

He was revealed in Eclipse to have hunted a werewolf across Siberia, but apparently did not know what his prey was – if he caught it is unknown. He is unremarkable in appearance, as he was unattractive as a human, so the vampire venom made him appear normal- unusual considering the circumstance of an unattractive human being turned into a vampire.