Lucas Ozera was the father of Christian, husband of Moira and brother of Tasha. He and his wife turned Strigoi. He was much older than Tasha and served like a father-figure when their parents died. He married Moira Szelsky, a celebrated beauty, when Tasha was seven. After his friends got killed, Lucas became fearful of dying himself, which led to his decision to turn Strigoi along with his wife, who feared losing her beauty. Before they were killed, they broke into Ronald Ozera's house to get Christian. He and his wife wanted their son to choose to be Strigoi when he was old enough and join forces with them until Tasha tried to defend the defenseless boy and that is how she got her scar.
Lucas and Moira were killed by the guardians.
He is said to resembel an older version of Christian.