“He only says three words — but in those three words lives more courage and heart than most heroes manage in a lifetime.”
A single twig is enough to regrow him entirely. After being destroyed in the first film, he regrew from a cutting in a flower pot.
He can stretch and reshape his limbs into branches, binding enemies or using them as weapons in improvised combat.
He can release glowing spores from his body — used to illuminate darkness, and to create some of the MCU's most touching visual moments.
He wraps his body around teammates to absorb impact — how he saved the team at the climax of the first film.
The one who says the most without words. Groot communicates through action — walking over to hold someone, or wrapping his body around the team. He seems simple but is deeply observant, and offers unconditional loyalty to anyone he considers family.