Nuada Kirie is the father of Tuan Kirie. Thirteen years prior to the story's events, he abandoned Tuan and her mother. This prolonged absence caused Tuan to harbor significant resentment towards him, perceiving his departure as abandonment. When she encounters him later, she expresses anger, directly stating her assumption that she must "clean up his mess." Their interactions reveal a complex relationship marked by estrangement and Tuan's hostility. Despite this, Nuada ultimately sacrifices his life to save Tuan, dying when killed by Elio Vashlov, a corrupt Interpol special investigator. This fatal act occurs after their long separation and serves as his final intervention for her. His death forces Tuan to confront his legacy and her unresolved emotions stemming from his abandonment, acting as a catalyst. His background, profession, motivations for leaving, and life during the thirteen-year absence remain undefined. His role is defined solely through his relationship with Tuan: his absence, her resulting bitterness, and his decisive, fatal intervention on her behalf.