The self-absorbed case of Mary-sue
Lyla Trinket-or-the-name-of-some-other-household-appliance was an abnormally beautiful girl with a multiple personality disorder. She had just transferred in from a faraway world and somehow ended up sitting right next to the most popular, good-looking guy in the entire school, earning her envious looks from both the female population as well as the occasional group of lurking fan boys.
Every single guy she meets end up liking her and by the end of the week, her school locker starts to overflow with love letters and death threats. She somehow gets extraordinarily good grades and is loved by all the different clubs who pine for her recruitment, none of which she eventually ends up joining.
By the end of the month, Lyla has gained a super power that enables her to fly around and shoot fireballs out of her palms at will. Her personality disorder is conveniently forgotten and the most popular guy in school has saved her from rapists 50 separate times despite her ability to produce fire out of thin air and, thus, giving her a sufficient amount of power for self-defence.
Lyla, being a mary sue, also automatically gains the ability to appear anywhere and everywhere throughout the course of the story, and get herself involved in all sorts of unrelated drama that she alone manages to mediate and salvage.
Finally, at the end of the story, she single-handedly saves the world from a rogue meteor randomly flying about in space; following that, she almost gets hit by a bus whereby she is saved by that exceedingly good-looking guy. They kiss and have babies.
The end.