Carlisle Cullen and Esme Cullen

Carlisle and Esme Cullen are one of the secondary couples in the Twilight Saga. They are vegetarian vampires and the most prominent part of the Olympic Coven. They are very mother and fatherly towards the other members of the coven. They welcomed Bella very quckly into the family.

Carlisle Cullen
Carlisle was the son of an Anglican pastor in the late 1600s in London. His father was responsible for leading hunts for beings of evil, such as witches, werewolves and vampires. When he became too old to continue them, he put his son in charge of the hunts. Although originally Carlisle was a disappointment, he eventually discovered a coven of true vampires living in the sewers. During a chase with them, Carlisle was bitten and changed into a vampire. To avoid slaughter, he hid in a potato cellar during the transformation. He was repulsed by himself and attempted to kill himself many times, but instead hid deep in the woods, away from humans as he could not justify the fact that he could murder an innocent person. But when a herd of deer passed by him, he attacked without remorse and discovered that he could survive on animals.

Carlisle was able to perfect his blood lust over the course of two centuries and began to study medicine, soon becoming a brilliant doctor. He traveled to Italy where he met the Volturi, who attempted to reunite him with his real food source. He refused and instead went to the New World - America.

He began to work night shifts in Chicago, during the time of the Spanish Influenza, in 1918. There he met Elizabeth Masen who demanded that he do everything he could to save her son, Edward. Carlisle did so and curbed his loneliness by turning Edward.

Not long after that, in 1921, Carlisle met a young woman named Esme who attempted suicide after the loss of her child. Recognizing her after he had treated her for a broken leg at 16, Carlisle turned her and she became Esme Cullen after they fell in love and married.

Carlisle continued to extend his family by turning several others such as Rosalie, a young women who had been beaten and raped, and who he hoped could have been a mate for Edward, but instead fell in love with Emmett, after she found him mauled by a bear in Tennessee, and Alice and Jasper, a mated pair who wanted nothing more than to be part of the family.

Esme Cullen
Esme first met Carlisle when she was 16; she had broken her leg from falling off a tree and he treated her. She never forgot about him and was forever in love with him, even when she married a man named Charles Evenson. He abused her greatly until he was drafted for war, which greatly pleased Esme until he returned. When she discovered she was pregnant, she ran away from him but unfortunately, her baby died. Esme tried to commit suicide but when she was mistakenly brought to the hospital morgue, her heart was still beating. Carlisle recognized her as Esme Platt from when he treated her, and he changed her. After explaining the rules of being a vampire to her, they fell in love shortly afterwards and were married.

Esme gained the ability to love passionately and this was shown through her ability to adopt every one of the Cullens into the family: Edward, Rosalie, Emmett, Alice and Jasper. She has a special place for Edward in her heart as he was the first of her "children". She had never regretted her existence as a vampire like any of the other Cullens (excluding Rosalie) as she can spend eternity with the man of her dreams: Carlisle.

Twilight
In Twilight, Carlisle and Esme play a fairly minor role. Carlisle treats Bella after the car crash which Edward saves her from. When she asks Charlie about the Cullens, he mentions that "that a lot of the nurses have trouble keeping their eyes on their work", even though he is married.

When Bella finally comes to the Cullens' home, after she falls in love with Edward, both Esme and Carlisle are happy for their son, the only one who had not yet found love. Esme, with her warm and kind nature, instantly welcomes Bella into their life and somewhat 'adopts' her as a third daughter.

When James, Victoria and Laurent come to Forks, and all but Laurent want to hunt Bella, Esme and Rosalie lead Victoria away while Carlisle helps Emmett and Edward with James. After Bella is attacked by the tracker, Carlisle helps treat her broken leg and head wounds.

New Moon
In New Moon, Esme and Carlisle are both present at Bella's party. Carlisle is the only one to contain his blood lust when Jasper tries to attack Bella and Edward pushes her out of the way, making her cut her arm open and needing stitches.

Carlisle and the rest of the Cullens travel to Ithaca after Edward leaves Bella. Esme goes to work restoring an early 1700's house while Carlisle works at the Ithaca hospital and teaches at Cornell University.

When Alice gets her vision of Bella committing suicide, Carlisle and Esme are away hunting at the time. They supposedly hear about the incident from Rosalie, because they are present at the airport to meet Alice, Bella and Edward. Both express deep concern for Bella.

They both vote 'Yes' for Bella to become a vampire. Esme tells Bella, "I already think of you as a daughter", before hugging her. Carlisle gives a more-drawn out explanation of why he votes 'Yes' and agrees to turn Bella after graduation.

Eclipse
In Eclipse, Carlisle and Esme play a slightly larger role. Carlisle takes charge when the family and Bella discover that it is newborn vampires causing trouble in Seattle. When Edward mentions that they may be targeting them, Esme doesn't want to believe it at first, suggesting that the Denali Coven might be the target instead, though they are too far away. Carlisle quickly organizes a plan with the werewolves and Jasper, to prepare to fight them.

During the fight, neither Esme nor Carlisle sustain any injuries, and Carlisle spares the young vampire Bree's life with Esme's agreement. They are forced to let her die when Jane orders for her to be killed.

Breaking Dawn
In Breaking Dawn, Carlisle and Esme are both present at Bella and Edward's wedding. When Bella finds out she is pregnant while on her honeymoon, both are originally not supportive of Bella's decision to keep her baby, but eventually both come around to support her. Neither of them are present for the birth, as they are out hunting, but it appears they make it back in time for Carlisle to assist with Bella's transformation.

Both Esme and Carlisle assist with tracking down witnesses to stand up for Renesmee, after the Volturi plan to destroy her and the Cullens after mistakenly hearing she is an immortal child from Irina. Carlisle attempts to talk to Aro and convince him that Nessie is not an immortal, but it is only after Alice brings back Nahuel, another vampire-human hybrid, that the Volturi retreat.

It appears that Carlisle and Esme, along with the rest of the family, return to their normal lives after the confrontation.

Midnight Sun
In Midnight Sun, Edward explains that Carlisle's love for Esme hasn't faded after 80 years, and he is sure that he will continue to love her this way and vice versa. This is due to vampires' feelings, personality traits and likes are frozen as their physical appearances, which makes love from a vampire permanent.