Exoskeleton Zero is a fictional armored or mechanized character associated with Kakugo no Susume. As the name suggests, it is portrayed as a zero-designated exoskeleton unit, suggesting a prototype, weapon system, or elite combat form rather than an ordinary human character. In the series, it functions as a powerful combat element tied to the story’s action and futuristic battle themes. It represents advanced technology, enhanced strength, and the harsh militarized atmosphere that defines the setting.