Zero-One, a master hacker, possesses gray hair with a shaven crown and piercing cyan eyes. His features include sharp cheekbones, a pointed forehead, and distinct pointed ears. Multiple piercings, rings, and a single left-ear earring adorn him. During his first appearance, he wears a beige shirt. He speaks in an unwavering monotone voice, exhibiting exceptional intellect focused on hacking. His expertise allows effortless access to any private data or information, demonstrated by his ability to locate entities such as identifying the owner of the North Gate Smoke Tower.