Bill Cipher's Daughter

Sapphire Cipher, the daughter of Bill Cipher, was born with a special ability to access both the nightmare and human realm. Once her dad found out she had this ability to jump dimensions, he sent her off to Gravity Falls immediately to become close friends the Pines family and get her hands on that rift. But when Sapphire falls for Dipper, that ruins her dad's plans.

Cover made by me.