T'gra joined starfleet young, when he was seventeen, wanting badly to travel the stars and perhaps one day visit the Klingon homeworld, a place he'd heard much about and had wanted to visit for so long. During his second year, his mother died of illness, which affected him greatly. Shortly after his mother's death, he met Arianna, a young woman who was much like himself-including being half klingon, half human. They went together during their Cadet years, but eventually drifted apart due to reassigning.

Onboard the USS Kirkwood, T'gra made quite a name for himself in the warp department, it being his major field of study. In 2376 he was promoted to Lieutenant, and made Warp Specialist for the Kirkwood. During a battle with the Dominion, the warp core was breached severely, and his CO ordered T'gra to shut it down. T'gra, being of thick skull, knew he could fix the problem, and disobeyed a direct order. Their was a courtmarshall and T'gra was demoted back to ensign, even though his plan worked.

In 2378 T'gra asked to be transfered, citing his CO was treating him unfairly because of his klingon heritage and his position of Warp Specialist even as an ensign. His CO had once been Warp Specialist, but didn't make that position till he was a full lieutenant.

T'gra was transfered to the USS Galaxy, and en route he met up with Ensign Arianna, his once love, who asked to meet with him.. Arianna surprised the Klingon Ensign by telling him he was now a father. He met his seven year old daughter, B'tella for the first time. Arianna also was dying from illness, and asked T'gra to take their daughter, since she would be dying soon.