Iris Yuma was a member of the affluent Yuma family and is currently a SoulWorker affiliated with the Starry Forest League. During her time in the Void, she was the leader of the anti-SinWorker faction in Grasscover Camp and was a SoulForcer who become a SinWorker. After Ladi’s disappearance and Haru’s and Erwin’s escape from Grasscover, Iris become frustrated with the camp’s leadership and left the camp. She eventually grew conceited with power after leaving and becomes a SinWorker. At some point, she joins the group of completed SinWorkers behind the massacre in the Great Void. She was defeated by Lakasha and becomes a SoulWorker shortly after leaving the Great Void