Originally a nameless slave known simply as "Cat" belonging to a man named Uusu, but became master-less after his death. Tama considers Pochi as her younger sister despite the fact that she is a Cat demi-human and Pochi is a Dog demi-human.

She was given the name "Tama" by Satou during the events of the labyrinth and became his slave after leaving the labyrinth. Tama would later take up Liza's family name "Kishreshgalza" when attending school.
(Source: Death March Wikia)