All you need to know about the Twilight saga characters

Alec

Alec is a member of the Volturi guard, serving as one of the highest ranked guards. He has a twin sister named Jane, who's also a high ranking member of the guard.

Jane and Alec are the Volturi's most offensive weapons, as they both hold abilities to completely take down an opponent, regardless of size. Alec possesses the gift of sense deprivation. He can completely cut off all senses of multiple targets.

While Jane is useful in making an audience fear the Volturi, Alec is their most offensive weapon.

Alec was born in England around 800 A.D, son of an Anglo-Saxon woman and a Frankish soldier. He was born a few minutes after his fraternal twin sister, Jane. Both Alec and Jane had strong psychic abilities that were evident even in their human state.

Aro had shown interest in Alec and his twin sister Jane since they were toddlers, but decided to wait until they were old enough to turn them (the Volturi had already instated its rules about immortal children) so left them in the care of their parents. Their talents had not taken a focused shape at that point, but bad things happened 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 in appearance, as well as the most prized members of the guard due to their incredibly powerful gifts. It is said that they are the cornerstone of the Volturi's offensive abilities.

About one decade after they joined the coven, Alec and his sister displayed their powers for the first time in battle and annihilated the Romanian Coven's army of over one hundred recruits.

Though not directly said, they could be considered two of the most powerful vampires in the world gift-wise, capable of taking down opponents regardless of size or age.

Physical description

""The boy in the pearl gray suit could have been Jane's twin. His hair was darker, and his lips were not as full, but he was just as lovely."―Bella on seeing Alec for the first time.

Alec is physically described as looking very similar to his sister, though his hair is a darker brown, he is taller in stature, and his lips aren't as full as hers. Alec, along with his sister Jane, is also described as being angelically beautiful. Alec as a permanent Guard member, a dark gray cloak, almost black, like his sister showing their rank in the coven.

Personality

Little is known about Alec as a person, though it seems that he is more lively, less sadistic, and calmer than his twin sister, Jane (whom he has a close relationship with). Alec has nevertheless proven to be just as ruthless and self-interested as she is. He can be considered the "sane" other half of Jane, looking at him from Volturi standards. He shows no remorse for taking anyone's life and carrying out the Volturi's frequently violent missions. There's a quiet confidence about him that, given his readiness to kill, is usually terrifying. Unlike his sister, Alec is not easily angered when Bella uses her shield to protect her family from his powers. Instead he simply leaves when Renesmee is proven not to be a problem. This is because in New Moon, instead of being apathetic like most of the Volturi Guard, he takes delight in teasing Jane for bringing two and a "half" vampires back to the castle of the Volturi. Alec is often confused for being the nice twin, but the author explains this to be the contrary. Stephenie Meyer explains Alec as the more calculating type, the one who will attack without warning.