Aiden Mathis (Barry Sloane)Aiden Mathis (Barry Sloane) trained alongside Emily under the watchful and ruthless Satoshi Takeda. He is the son of Trevor Mathis and the younger brother of Colleen Mathis. He is a skilled fighter and a master manipulator. Like Emily, Aiden is initially motivated by revenge and is, in many ways, the male equivalent of Emily. Aiden seeks retribution on the men he believes are responsible for the disappearance of his sister. Because of this, Emily and Aiden share a special bond. However, Emily feels betrayed by Aiden. It is because of Aiden that Emily feels that she can trust no one.