Teeno was the pet bramble lynx of the Dathomirian Nightsister Merrin when she was a child on the planet Dathomir. According to Merrin, Teeno started out small but she was raised right to become "very cute;" she was protective of Merrin and would rip anything apart for her. Teeno was fond of nydak blood and being scratched under the chin.
In 20 BBY, Merrin was one of the only survivors when General Grievous and his Separatist Droid Army attacked and killed the Nightsisters; she never saw Teeno again. Between 12 BBY and 11 BBY, Merrin was part of the Stinger Mantis crew and looked back upon her pet as the best creature she had ever known. When her new lover, the Imperial deserter Chellwinark Frethylrin, asked her to say something about herself, Merrin talked about Teeno. Frethylrin was amused when Merrin said the bramble lynx was "very good at murders," then comforted Merrin regarding her losses.
Teeno was mentioned in the 2023 novel Jedi: Battle Scars, which was written by Sam Maggs.