Tiffany Duskblight (TIS)

She is Ethan's stepfather's daughter from his first marriage. After his mother decides to remarry, she moves into an apartment to live with Ethan's mother and his stepfather. Their unexpected reunion at the hospital makes Ethan hope to get a clue about his mother's whereabouts. But instead, it makes Ethan even more confused. Just like Larry and Emma, she is also a demon hunter.