Octavia Blake

Octavia Blake is a major character in the first, second, third, fourth, fifth, sixth, and seventh seasons. She is portrayed by starring cast member Marie Avgeropoulos and debuted in the series premiere. In the first season, Octavia often helped Clarke as a medical assistant and collected information on the Grounders for the Delinquents. She is part of the original 100 and was sent to juvenile lockup for being a second child which was against the law on The Ark. While on Earth, she faced many challenges: learning to be free, fighting for the survival of the Delinquents, trying to get into Mount Weather and save her friends, stopping A.L.I.E., losing Lincoln, and keeping 1,200 people together peacefully in one bunker. Octavia was the lover of Lincoln. She embraced Grounder culture early on having never felt a part of the Sky People due to the circumstances of her birth, opting to wear Grounder clothing as well as applying Grounder war paint and getting at least one tattoo. She was the first to start speaking Trigedasleng, the Grounder language. In Season Four, Octavia fought and won the Final Conclave for the right of the Sky People to live in the bunker. However she decided to allow all 12 clans to live in the bunker, and to become one clan, called Wonkru.