GROOT GROOT This sentient alien tree branches out of his comfort zone to help the Guardians of the Galaxy keep the people of the universe safe. Walking, talking tree-like being, Groot is the best friend anyone could ever desire in the big, wide galaxy. In the prison called the Kyln, Groot and his partner Rocket worked with Star-Lord, Gamora, and Drax for the first time in order to escape together. Notably strong, Groot is capable of taking on multiple foes at the same time.