He is the son of the Samuel and Laura Alejandro, the Haring Aswang and Reynang Aswang respectively. He was Juan Dela Cruz's friend and love rival fighting for the heart of Rosario. After he was rejected by the Rosario in favor of Juan, he became destructively jealous with Juan. His jealousy worsens upon sensing his father favoring Juan before him and learnt that he was not the prophesized Anak ng Dilim, but Juan.
He vows to kill Juan at all cost, who stealed everything from him - his love, his father's approval and his destiny. He hired some of his fellow aswang to kill Juan and even committed arson against Juan's neighbourhood.