I cannot figure out how to unlock the final character. Am I supposed to use a specific set of foods? Am I supposed to get a sufficiently long combo? Am I supposed to do this on a specific challenge mode? The clue is just a bit too vague for me to understand. The rest were easy to understand, as they specifically called out the specific mechanic that was needed, whether it be a challenge mode, a character requirement, or other unlock condition, but I just cannot interpret this last one.