Groot

True to his species Groot is used as a scout on the battlefield. His speed allows him to glide quickly and (often) unnoticed above the enemy. Finding weak links and advantage points along with secret entrances and loot. He carries around a map on which he notes down all useful pieces of intel.
It is rare for Groot to engage in physical contact however when he does he prefers to use stealth. Mastering the art of camouflage, he slips around opponents like a whisper in the wind.
Through training his goal is to be able to accurately pinpoint where everything is from a greater distance. He still works hard on improving his speed with the help of Yaa.