Chi was the first Officer of the Earthling Cruiser Tobermoon, second-in-command to Captain I. Burton. He was also Burton's fiancé. After Captain Burton decided to disobey the order to evacuate the Vela scientific expedition and destroy the Precursor base, Chi was ordered to return to Earth with the Tobermoon to inform Star Control of Burton's decision.
On Captain Burton's return trip to Earth, the Tobermoon was discovered drifting derelict in Vela's Oort cloud. No remains of the crew nor of First Officer Chi were found.