The ciphers' girl (Bill cipher x reader x Kill Cipher x Will cipher)

Mr and Mrs Pines had a third quadruple named Y/n. Ever since a young age (before the twins/ dipper and Mable could remember) strange things have been happening, so they sent her off to god knows where. When y/n gets reunited with Pinetre-Dipper and Shooting sta- Mable weird things happen. Even stranger then what Y/n is used to!

(Your 'zodiac' is what ever YOU want. I'm just gonna go with dat. Your zodiac= Y/z)