A typical teenager
Groot is a character from the Marvel universe made particularly popular by the film adaptations of the Guardians Of The Galaxy comics. Groot is a sort of anthropomorphic alien tree working in tandem with the bounty hunter Rocket, himself a genetically modified raccoon. Groot only speaks with one phrase I am Groot” which seems to be able to say a lot of things and he seems to have some kind of superpowers like the one to make his limbs grow at will. At the end of the first Guardians Of The Galaxy movie, he sacrifices himself to save his friends but Rocket recovers some shoots and manages to grow a new Groot. This makes him still a child in the second opus of this license and he became a teenager in the movies Avengers Infinity War and Endgame.