Aw, Groot.... the big adorable lug blinked in confusion as the masked man crouched down on his shoulder, looking briefly to Rocket as if looking for some validation, before just making up his own mind. If this guy was trying to help? Whatever idea he had here couldn't be any crazier than some of the crap Quill had come up with...
"I am Groot!" He yelled quickly, before grabbing the costumed hero and, indeed, hurling him at the cannibals. All Groot could think was, this kid was either incredibly courageous, or incredibly stupid.