Jane is a high-ranking member of the Volturi guard in the She is the twin sister of Alec and adoptive sister of Aurelie and together they are the Volturi's most powerful offensive weapons. Jane has the ability to induce a crippling, although illusory, pain in other people's minds, which serves greatly in instilling fear and maintaining order to confrontations.
Jane was born in England around 800 A.D, the daughter of an Anglo-Saxon woman and a Frankish soldier. She was born a few minutes before her fraternal twin brother, Alec. Both Jane and Alec displayed strong psychic abilities that were evident even in their human state.
Aro was made aware of Jane and her brother through the thoughts of a visiting nomad. Aro had shown interest in adding Jane and her brother to the guard, but decided to wait until they were old enough to turn them (the Volturi had already instated its rules about immortal children) and left them in the care of their parents. Their talents had not taken a focused shape at that point, but bad things tended to happen to people who were unkind to the twins or their family, and good luck followed those who were friendly to them. Eventually, the superstitious locals found the twins too frightening to endure. They were accused as witches and condemned to be burned at the stake. Aro was apprised of the situation by a nomad who knew of Aro's interest in the twins. Aro hurried to the village, arriving just in time to interrupt the execution. Transformed at the age of about 12 or 13, they are the smallest and youngest vampires in appearance, as well as the most prized members of the guard due to their incredibly powerful gifts.
Due to the pain Jane experienced while burning at the stake and the anger she felt towards the villagers, her power took on a sharper form after her conversion into a vampire; she gained the supernatural talent of inflicting the same burning pain on others in the form of illusion. Jane has since become one of the most prized members of the Volturi's guards, along with her brother Alec. About one decade after they joined the coven, Jane and her brother displayed their powers for the first time in battle and annihilated the Romanian coven's army of over one hundred recruits. Since then, they have been known world-wide as the two most powerful vampires that ever existed and are considered the cornerstone of the Volturi's offensive abilities. Jane's power was so frightening that she came to enjoy inflicting it on others and receiving respect for her power. Over the centuries, she had absorbed some of Caius's sadistic personality in the process.
Aurelie - Her beloved adoptive sister. Jane loves her fiercely, although finds it very difficult to both display her affections and maintain her sadistic and frigid reputation at the same time. She wants to keep Aurelie out of her Volturi business, due to the high risk factor and Aurelie's tendency to want to protect Jane.