One day you were arriving home after a long night of being out on a walk with Jane and Alec to find out the girl who has always envied you, has tricked the whole Volturi except Caius as he is your mate and your everything about you into believing that she is you by dressing and acting exactly like you. So when you came through the door everyone glared at you except Caius

Aro: who are you? And why are you copying Riley?