Someone with a darker side you cannot detect, because they're always trying to get everyone to show their brighter, positive side.
She denies having any darker, negative feelings because with her surface wholesome image, she wants the world to think she is lighting up the world around her, even if everyone continues to turn on each other, and things continue to get worse every time they change, even if all her friends and family and everyone around her but her is dysfunctional and fucked up. The results of her behavior are all negative, but everyone is expected/forced to call it something positive like hope for her. There are some of us that just want to openly darken the world around us a little more without the pretense of doing anything good for anybody else, or helping/saving anybody else.