Flash could be considered the stereotypical mean character, as she rarely smiles except when she witnesses people she dislikes suffering or when she gains an advantage such as winning a challenge in Battle For Grandma. However, she's much more than that. She's realized that she could be perceived as this, and uses that to her advantage. She's a master manipulator, using the other's naivety to progress through the game. Even if she is technically a "mean character" to her peers.