I'd accept Man in the Yellow Hat as well, also maybe allow just Violet without the last name required? I feel like most people wouldn't remember it but it seems to be fairly highly guessed so maybe it's more memorable than I thought
I added The Man in the! I think Violet should stay as is since 60% got it. In the original Willy Wonka film most of the main characters are repeatedly referred to by their full name (Charlie Bucket, Augustus Gloop, Veruca Salt) which explains why so many knew the answer.