When Aries, Taurus, etc. Died, they became the zodiac signs. They lived a separate life before becoming immortal.

Aries: He once burnt down a police station

Taurus: She smuggled Starbucks

Gemini: Has an actual twin she keeps secret of

Cancer: Took an extra pencil from the teacher

Leo: Stole expensive makeup from a store

Virgo: Smacked a classmate because they triggered there OCD

Libra: Went too far with a prank and hot someone into the hospital

Scorpio: Killed (almost) and entire family

Sagittarius: Plagiarized

Capricorn: Was 20 minutes late too church

Aquarius: Got so mad at the zodiacs they trashed an entire house, having a temper tantrum (Yeeah not his finest moment)

Pisces: Took a button that wasn't hers. (For now...)