Oh, and about that origin story? McDonald's is still being coy about what, exactly, Grimace is. Yet it is offering this window into his past: "Grimace is from Grimace Island and comes from a huge family (including his Grandma Winky, aunts Millie and Tillie and his Uncle O'Grimacey!) Our timeless bestie has become a fan-favorite known for his signature fuzzy purple look, friendly and playful personality, love for shakes, and of course - ambiguous nature."