Gertrude

Gertrude is a female Tyrannosaurus Rex from the Prehistoric Era in South Dakota. When Ray Palmer was stranded in that time, he stole one of her eggs and ate it. Ever since, Gertrude has been hunting him down. She encountered him in the middle of the forest but he was saved by Mick Rory and Nate Heywood. When the engine from the Waverider got lost in Gertrude's nest, Ray, Amaya Jiwe and Nate searched for it. When Gertrude encountered them after they got the engine, Amaya used her Anansi Totem to communicate with it and Gertrude left afterward.