Jasper Jordan was a major character in the first, second, third, and fourth seasons. He was portrayed por Devon Bostick and debuted in the series premiere.

Jasper was part of the original 100. He was arrested along with his best friend, Monty Green, for stealing herbs from the Ark garden and sent to juvenile lockup. Jasper was a Gunner for the Delinquents against the Woods Clan. Jasper also served as the primary chemist for the 100's time on Earth.

Jasper battled PTSD that developed after he was speared in the chest in Pilot. This has continued on throughout the segundo season. He was initially...