Known as Painter, Nikaro is a 19-year-old nightmare painter from Kilahito, whose journey in the novel explores themes of self-discovery and artistic passion. His character development is interwoven with his budding relationship with Yumi.

A recurrent character in Brandon Sanderson's Cosmere, Hoid serves as both the narrator and a minor character in the story, providing insights and commentary while maintaining a humorous and mischievous presence.

The main antagonist of the story, the father machine is a large stone-stacking device that upends the world due to its misuse of spirit energy, embodying the novel's critique of mechanical art devoid of human touch.

Yumi’s strict and severe warden, Liyun enforces rigid discipline over her life and personifies dedication to duty, playing a complex role as both an adversary and eventual helper.

A group of nightmare painters and friends who reconnect with Painter and help Yumi explore life beyond her duties, these characters support the protagonists and contribute to key events in Kilahito.