Is mimi from paper Mario a child?

Mimi from "Paper Mario: Sticker Star" is not explicitly identified as a child; rather, she is a shape-shifting creature known as a "Mimi." Her design and playful demeanor might give off a youthful vibe, but her character is more complex, serving as a primary antagonist in the game. Ultimately, her age isn't clearly defined, making it ambiguous whether she can be considered a child.