Carlisle Cullen

Carlisle's most prominent personality trait is his compassion, which is what prompted him to practice his diet on animal blood and use his capabilities to help people in need instead of killing them. Stephenie Meyer has said that his "compassion-motivated self-control is really so incredible that it almost crosses the line into 'superpower'."

His loneliness in the years before he changed Edward and his love for his "children" also indicate that, like Esme, he is very family-motivated. Carlisle is also very patient and non-judgmental. He has a passion for art collecting, reading, and medicine. He is also very curious about the unknown, such as the genetic makeup of the Quileute tribe.

His peaceful and accepting nature has allowed him to make many friends, ranging from fellow vampires to humans and even werewolves, over the centuries. For a time, he was even willing to tolerate life amongst the Volturi, despite the marked contrast between his great compassion and Aro's callous disregard for human life - as shown, for example, when Aro dumped a profusely-bleeding human body outside the library where Carlisle was studying for no other reason than to test Carlisle's self-control.
Appereance
"Then a doctor walked around the corner, and my mouth fell open. He was young, he was blond… and he was handsomer than any other movie star I'd seen. He was pale, though, and tired-looking, with circles under his eyes. From Charlie's description, this had to be Edward's father."
―Bella upon seeing Carlisle for the first time[src]
Carlisle is described as looking like a model. He has collar-length blond hair, is 6'2", with a well-toned medium frame, gentle eyes and was 23 when he was changed. He is described as looking like a movie star and Charlie (Bella's father) said that many nurses cannot concentrate on their work while he is around. But as soon as Carlisle was settled and married to Esme, Charlie said that the admiration was quickly hushed in the hospital. Carlisle is slight but muscular and has a slight English accent from his youth, but can speak with a flawless American accent. It is also stated in Breaking Dawn that he looks like Zeus's "younger better-looking brother" .[4] His original eye color was blue before becoming a vampire.
Abilities
Carlisle came up with his own theory as to why certain vampires have enhanced abilities; they bring something from their previous human life into their new vampire existence. Carlisle is also immortal, and had spent centuries perfecting his medical talents, becoming an excellent doctor. Unlike most vampires, after 300 years of practice he is no longer tempted by the scent of human blood, and is able to use it to help him in the workplace, therefore turning his "curse" to his advantage. He also believes that every vampire's strongest ability is enhanced during their transformation. What he brought into his next life was his incomparable compassion for humans and vampires,[5] which was what prompted him to redirect his diet to animal blood in the first place. He also uses his sense of smell to locate injured people who might have a chance to be saved.

Despite his naturally gentle personality and superior control over his instincts, he is also quite adapted in combat much like his adopted children and wife, as he easily conquers newborns in Eclipse.