Evie and her twin brother Jacob were raised by their grandmother in the English countryside, after their mother Cecily died giving birth. Once they reached the age of six, their father Ethan began their training in the ways of the Assassins.
Being the more studious of the pair, Evie's approach was more measured and tactical than that of Jacob, whose impatience and gusto when acting alone often cost the twins more than it gained them. Working in tandem gave the duo the necessary balance to greatly enhance their effectiveness.
Both brother and sister would always capture some small amount of blood on a handkerchief from their assassination targets.