∇
troperville

Basic Trope: A person who will bring the end of the world simply by existing; the problem is that s/he is also well-known to or even the beloved of the main character.

Straight: Rei's sweet little sister Mei is fated to destroy the world.
Exaggerated: Mei is such a sweet girl, if not for the fact that she's a Walking Wasteland, attracts hordes of alien bugs, and is fated to destroy the galaxy.
Downplayed: The Jinx
Justified:
- Mei's soul/DNA/whatever is the key to activating the Doomsday Device.
- Mei is only half-sister to Rei, her father is an Eldritch Abomination. Even if she does nothing, Mei's simple existance causes space-dimensional distortion, breaking the wall between Earth and the Eldritch Location, bringing unspeakable terror to Earth.
Inverted:
- Mei is a total Jerk Ass, but since the world will end without her, everyone is forced to protect her and satisfy her callous whims.
- Mei is a Barrier Maiden— without her, evils from outside the world will destroy the world.
Subverted:
- Mei might be fated to destroy the world, but the prophecy isn't exactly set in stone...
- It's only certain part of Mei that is fated to destroy the world. Remove that part, and Mei is free to live her life.
- Mei leading to the destruction of the world is Metaphorically True at best. While she does lead to the destruction of the world it is Rei's Roaring Rampage of Revenge that does the damage. Killing her in the first place is what causes Rei to conclude any world willing to kill innocents to save itself isn't worth saving.
Double Subverted:
- ...but the attempt to subvert Mei's fate is the action that destroy the world.
- But that part is integral to Mei's being... i.e., her soul.
Parodied: After knowing that she's an Apocalypse Maiden, Mei dyes her hair pale blue and starts acting emo.
Zig Zagged: ???
Averted: The much-feared apocalypse isn't caused by a single person.
Enforced: "The contradiction! The drama! Let's make the hero choose between the world or her little sister!"
Lampshaded: "Ending the world?! This little missy here? You've got to be kidding me, dude."
Invoked: Karen, an alien from the 26th dimension trapped in this mundane world, goad Mei into destroying the world so s/he can return to his/her origin.
Exploited: Emperor Evulz kidnaps and mind rapes Mei into becoming his puppet, effectively keeping the world hostage.
Defied: Some pragmatic people seal Mei in a can.
Discussed: ???
Conversed: ???
Deconstructed:
- Being an Apocalypse Maiden makes people mean to Mei, so she decides to fulfill her fated role to make the goddamn pain stop.
- Since people are mean to her little sister, Rei decided that the world should end and she wholeheartedly supports Mei to carry her role.
- Rei destroy the world before Mei can enact her role as an Apocalypse Maiden, to save her from the anguish of destroying the world with her own hands.
Reconstructed:
- Rei's love for Mei allows her to endure people's hatred.
- Rei and the Five-Man Band travels into Mei's soul to destroy the growing soul-parasite that will destroy the world.
Played For Drama: Saving Mei from Karen/Evulz/the pragmatic people/her dark side and convincing her that the world is worth living, even if Humans Are Flawed.
Implied: Rei is found centuries later without any trace of her old personality or past and her weapon was found in Mei's crypt still within her dead body. It is possible that someone stole her weapon and did it or she was forced into killing her and obliterated her own memory because of it.