Alice Cullen
Born Mary Alice Brandon, Alice was born around 1900 and turned into a vampire when she was about 19. She was was held in a mental asylum because of her ability to have visions. There she was the favorite of a vampire who worked in the building. James, a hunter vampire, took the challenge of hunting her simply because another vampire desired her. Once it was clear to him that James was after her, he, the vampire who worked in the asylum, freed Alice and changed her before James could kill her. James killed the other vampire instead. She had no memory of these events and was left to find her own way.
Jasper Hale
Born Jasper Whitlock, Jasper was born in 1843 and turned into a vampire at 20. He served as a Major in the Confederate army during the Civil War. The vampire family that changed him in 1863 was very different from the Cullens in their dietary habits –they fed off humans. Jasper became depressed over his way of life and sought something better. His search led him to Alice in 1948, which in turn led him to Carlisle in 1950.
Jasper and Alice
Alice found Jasper thanks to one of her visions, and waited for him to come to her. When he did, when they finally met
it was certainly a bit of a love at first sight, as they recognized each other instantly and fell in love. Jasper once said that when he saw her and took her hand,
he felt hope for the first time in almost a century.
They share a very sweet and yet deep relationship, it's obvious they love each other, but they're very quiet about it,
and communicate their love mostly through looks and silences. Jasper would do anything for Alice, and he has changed his way of life mostly for her.
No matter how difficult for him it must be to be around humans, he goes to school for her, to be with her.
They are married, and, unlike Rosalie and Emmett who have done this a few times, have only married once.
Jasper and Alice's profiles were taken from the Twilight Lexicon, and the little blurb about their relationship was written by me. Sorry about that ;)