Edward Cullen
Edward is described in the book as being charming, polite, determined, and very stubborn. He is very protective over Bella and puts her safety, humanity and welfare before anything else. He often over-analyzes situations and has a tendency to overreact, especially in situations where Bella's safety is at risk.
Bella Swan
Bella is a smart yet quite clumsy seventeen-year-old girl who spent her life in Phoenix with her mother until recently. She moves to cold, rainy Forks to live with her father for the first time. Here she meets and falls in love with Edward Cullen, a teenage vampire. Some of her qualities, like being pale and claiming to be able to smell human blood, make her seem like a vampire herself, but her human mortality is a constant theme in her relationship with Edward.
Jacob Black
As Jacob's character emerges in New Moon, he is shown to be cheery, passionate, and adventurous, but hot-headed. Jacob is also able to shape-shift at will into a giant wolf, and sometimes when angered he will involuntarily phase. His body temperature is warmer than a human's body should be, reaching about 108.9 °F (42.7 °C), which allows him to withstand very cold weather.
Jasper Hale
one of the few surviving vampires of the Southern vampire wars, who later joined the Olympic coven. He is the husband of Alice Cullen and the adoptive son of Carlisle and Esme Cullen, as well as the adoptive brother of Rosalie Hale, Emmett and Edward Cullen. Jasper is also the adoptive brother-in-law of Bella Swan and the adoptive uncle of Renesmee Cullen.