they can be from fanfictions or novels. I personally think Bella is a HUGE Mary Sue, and so are Alice Cullen, Rosalie Hale (even worse), Esme Cullen, Renesmee, Zoey Redbird, Aphrodite (from the House Of Night series)..even though I love House of Night I still think they are big Mary Sues. I think Aislinn from the Wicked Lovely series is a Mary Sue too, because she's Queen of the summer fairies and she has two guys after her, but she's not as bad as the other ones I mentioned. btw, a Mary Sue is a character who's gorgeous, has no flaws and has a dramatic past, etc. (just in case you didn't know)