Niylah is a recurring character in the third and fourth seasons. She is portrayed by actress Jessica Harmon, and debuts in Wanheda (Part 1). Niylah is Grounder who runs a trading post with her father. She has been secretly trading supplies with Clarke during her self-exile, and later helped her escape the Ice Nation bounty hunters. After ALIE's defeat she comes to Arkadia. She sleeps with Clarke at the beginning of Season Three and again in Season Four.