Mary Poppins

"'Did somebody call my name?' 'Holy crap! Mary Poppins is real?!' 'Wha-? Mary Poppins is a woman?!' - Mary Poppins, Peter Quill, and Yondu Udonta"Mary Poppins is a magical British nanny and the titular character of the Mary Poppins novels and films.

How Guardians of the Galaxy Vol. 2 Should Have Ended
Mary Poppins's only HISHE appearance so far was in "How Guardians of the Galaxy Vol. 2 Should Have Ended," where she appears at the Super Café as Yondu was repeatedly yelling, "I'm Mary Poppins, y'all!" during a catchphrase battle. Peter Quill is shocked that Mary Poppins is real, while Yondu, having believed her to be male, is surprised that she is a woman.