Some TMNT stuff really isn't for little kids.
Trib is the daughter of King Zenter and Queen Gizzla, first seen on her home Planet Neutrino being abducted by Captain Tragg. The Turtles and the Neutrino Resistance Fighters were able to free her from General Krang's forces, but were unable to rescue her parents for the moment.
She insisted on taking an active role in resisting Krang and rescuing her parents, following Commander Dask and the Turtles into combat and shooting at her enemy.
Michelangelo developed a crush on her, although it isn't entirely clear whether it is reciprocated. Either way, they are friends in future appearances together.
She met the Turtles again during the story arc The Trial of Krang, in which the Neutrino royal family hosted the trial. The Turtles returned to Dimension X to lend their help, and she was delighted to meet them, hugging Michelangelo after a greeting ceremony.