Gillian McCarthy

Gillian McCarthy was a member of the Templar Order, who relied on her talent of seduction to gain the favors of the most influential politicians. As orphan, Gillian had to survive and protect her brother.

Her genetic memories were later used as an Animi Avatar by the Templar company Abstergo Industries, for the training of their Animus recruits, under the title of Lady Maverick.

Source
First details on the Multiplayer Characters