Grimace was originally portrayed as a milkshake thief before becoming a friendly McDonald’s mascot.
When Grimace first appeared in McDonaldland advertising, the character had a more mischievous role and was associated with taking milkshakes. McDonald’s later changed the character’s personality and presentation, turning Grimace into a cheerful companion of Ronald McDonald and the other characters.
The shift illustrates how mascot branding can evolve when a character’s early design or behavior does not fit a family-friendly image. The later Grimace was a large, purple, simple-looking character whose appeal came from his friendliness rather than from a specific product or villainous role.
Grimace is often confused with the Hamburglar, whose identity centered on stealing hamburgers. Birdie represented breakfast, while Officer Big Mac was another McDonaldland character. Their distinct roles helped McDonald’s build a wider fictional world around its restaurant brand.