Alex was born in Eastern Celtic Britain, she was the daughter of a warrior father and a priestess mother. She grew up to be a fighter like her father. Alex died in battle against the Romans and became Immortal. She was soon found by fellow Immortal Ceirdwyn who taught her about her Immortal heritage. In 1942 during World War II she was in Warsaw, serving as a spy. She fell in love with David Leiner, a Jew confined to the Warsaw ghetto. They were killed together, but Alex revived and took David's son, Max, as her ward.