Originally a nameless slave known simply as "Dog" belonging to a man named Urs, but became master-less after his death. She was given the name "Pochi" by Satou during the events of the labyrinth and became his slave after leaving the labyrinth.

Spoiler

Pochi would later take up Liza's family name "Kishreshigarza" after being conferred the Honorary Chevalier title and rank.