in this au mabel and dipper are both good fighters. before summer vacation they got into some trouble so their parents sent them to gravity falls before they could cause more damage.
being able to fight helps them out of many mysterious situations that happen at gravity falls. they are both very protective of each other. they hate being called babies and will beat anyone up that calls them this.
other than this they are basically still the same character. dipper still does his "nerdy" stuff and mabel still does her "girly" stuff.
kill cipher is the alternate bill cipher. he's red and really likes to inflict pain on others just for fun.
fanart:
comic:
ALSO! the best way i know how to explain the cipher/pine twins relation ship is that bill is above them in gravity falls, will is below them in reverse falls, and kill is equal to them in fight falls.
in gravity falls bill controls them, in reverse falls they control will, and in fight falls they fight each other.