( this is a gravity falls Mabel x Pacifica fanfic ) Mabel is a mermaid who doesn't belive in RuLeS or PiRaTeS, what even is a pirate? And rules are just a big wall in the way of fun! Pacifica has a fathers that is a caption of a large sailor crew, his latest craze, mermaids. Pacifica doesn't see the point in bringing her along, she's bound to get bored. What happens when these paths cross? ( I do not own gravity falls, this is simply an au, gravity falls belongs to Alex Hirsch )