The signs as YA magic tropes (and the characters that inspired them):
Aquarius: Attends a magic school. Sophie, the Hex Hall Series by Rachel Hawkins
Pisces: Has lethal powers. Nina Zenik, the Six of Crows duology by Leigh Bardugo
Aries: Magic always has unintended consequences. Kendra, the Kendra Chronicles by Alex Flinn
Taurus: Owns an enchanted weapon. Amy Gumm, the Dorothy Must Die series by Danielle Paige
Gemini: Has magic return after a long drought. Safiya & Iseult, The Witchlands series by Susan Dennard
Cancer: Stuck in a battle between good & evil. Nathan, the Half Bad trilogy by Sally Green
Leo: Is the Chosen One. Simon Snow, Carry On by Rainbow Rowell
Virgo: Becomes friends with an elf. Hermione Granger, the Harry Potter series by J.K. Rowling
Libra: Falls in love with someone non-magical. Lena Duchannes, the Caster Chronicles by Kami Garcia
Scorpio: Rides a flying creature. Manon Blackbeak, Throne of Glass series by Sarah J. Maas
Sagittarius: Friends with a vampire. Magnus Bane, Mortal Instruments series by Cassandra Clare
Capricorn: Is the most special of all the special people. Tea from The Bone Witch by Rin Chupeco