Mortis appears to be a giant robot with a massive computer screen as a head and a smaler one on the chest pulsating a digital green heart. Aswell as having an arm cannon and a minigun that shoots out swords. The screen they uses changes expressions the more damage they take. Mortis also has multiple wires and cables dangling from their body, and is incredibly massive.

Mortis uses exclusively They/Them and first person pronouns "we/our", due to their implied hivemind nature.