An ever curious cat, Zero is both an adventurer and tinkerer. He loves to collect scraps of metal and machinery to piece together in some way, and has a knack for fixing broken items or creating new devices from scratch. They're often useful, but sometimes are redundant or full of flaws, which only encourages him to try again.

He has a bit of a one-track mind, focusing intensely on the work at hand and being oblivious to other things around him. His workshop can become a mess due to this, and he is often having to rearrange and organize it after long projects.

He travels a lot, wanting to see the world and what he can find within it. He hops from mechanic shop to mechanic shop on his journeys, often unbeknownst to whoever owns them. He spent a lot of his life in a desert climate, and as a result always has goggles available to shield his eyes from wind and sand.