Mary Xavier is the head of "The Refuge", the orphanage of the Time Masters, and an adoptive mother of Michael, a boy who would become the rogue Time Master Rip Hunter. She raised Rip since he was ten and stayed a friend of his adult-self even after he rebelled against the organization she was affiliated with, the Time Masters, helping Rip Hunter's team when they were hunted by an elite Time Master assassin, the Pilgrim.