The signs as The 100 Characters:
Aries: Marcus Kane
Taurus: Finn Collins
Gemini: Octavia Blake
Cancer: Commander Lexa
Leo: John Murphy
Virgo: Jasper Jordan
Libra: Monty Green
Scorpio: Clarke Griffen
Sagittarius: Bellamy Blake
Capricorn: Lincoln
Aquarius: Raven Reyes
Pisces: Anya