Zero Tortoise is a fictional character from the anime series Frame Arms Girl, a show that revolves around miniature robot girls known as Frame Arms Girls. These Frame Arms Girls are AI-powered models that can think and act independently. Zero Tortoise is one of these models, characterized by her unique tortoise-themed armor and weaponry. She plays a supportive yet pivotal role in battles, known for her strategic thinking and defensive capabilities. Her calm demeanor and tactical prowess make her an invaluable ally to the main characters in their various encounters throughout the series.