A Valiant Commander, Singleton is a relic from Humanity’s warring past, escorting Lucy Tak's expedition to appease concerns back on Earth. When unanticipated threats emerge, Singleton proves to be Lucy’s most trusted advisor on the battlefield.

We fight so that others may live.
- Singleton

Singleton is one of the earliest graduates of the Valiant Program, a program dedicated to creating high-functioning machines capable of making quick judgement in uncertain situations. Blending disciplines from robotics and early childhood development, the Valiants were said to have been programmed with only one instruction: "That Others May Live". Life would teach them the rest.

Instantiated in the late 21st Century, Singleton served as a soldier for two centuries before being decommissioned for a third. Singleton continues to compile his one line of code.