the girl in the back of the ballroom

there is a pink haired girl who appears across countless stories, she is never introduced or acknowledged but she can always be found in the back of a ballroom whispering to her friends. this is her origin story, watch as nova awakens to her destiny, travels through diffrent worlds, makes countless friends, and ruins some life's with a little gossip, all for the sake of a good story. now the only question is why is nova entering these worlds AND WHO IS NOVAAAAA ???????