The signs as Gravity Falls Characters:

Aries: Pacifica Northwest

Taurus: Wendy Corduroy

Gemini: Bill Clipher

Cancer: Mabel Pines

Leo: Stanley Pines

Virgo: Dipper Pines

Libra: Gideon Gleeful

Scorpio: Stanford Pines

Sagittarius: Soos Ramirez

Capricorn: Blendin Blandin

Aquarius: Robby Valentino

Pisces: Fiddleford McGucket