Grimlock

a green-black transformer robot, race - dinobot-autobot, originally on the side of the Decepticons, yellow face with completely blue eyes with white rainbows, sharp fangs, at first by his appearance it seems that he is evil and omnipotent, although by nature he is a "sweet bun", kind, sweet, loves a fight and will stand up for his friends - Bumblebee, Strongarm, Sideswipe and Fixit, and also for 2 people - Danny and his son Russell, currently live in a landfill, has tremendous physical strength, transforms into a dinosaur - namely a tyrannosaurus. Optimus Prime sent Bumblebee and (accidentally) some transformers to Earth on an important mission, and they live there secretly, which only a few people know about.
Grimlock was a prisoner on a prison spaceship, after the crash of which he forced the Decepticon Underbite to free himself, and soon finds a common language with the Autobots. With his friends, he searches for Decepticons and captures them, after which they put them in stasis, and prepare for the emergence of a great evil, the most dangerous Decepticon - Steeljaw, similar to a wolf.