Nadeko Masurao, often called simply Nadeko, is a supporting character in Mistress Kanan is Devilishly Easy. She is a high school student and a classmate of the male lead, Youji Kyougi, whom she has known since childhood as a longtime friend. Nadeko is taller than average and has light skin, long black hair that reaches her mid-back, and dark colored eyes. Her full surname, Masurao, carries connotations that she finds masculine, and she does not like being addressed by it. This personal discomfort with her own name hints at her sensitivity regarding how others perceive her. Throughout the series, Nadeko’s personality undergoes a notable evolution. Initially, she functions primarily as a familiar presence in Youji’s life, someone who knows him well enough to point out the gaps in his understanding of Kanan. Early in the story, it is Nadeko who causes Youji to realize that he and Kanan know almost nothing about each other despite having started dating, highlighting her role as a grounded and observant peer. As the narrative progresses, her character shifts, displaying a more dynamic and evolving temperament. Her motivations are tied to her friendship with Youji and her place within the school community. She does not possess supernatural abilities and is not involved in the demonic or heavenly conflicts that drive the central plot. Instead, her role is that of a normal human who provides social context and a relatable perspective, offering commentary on the unusual relationship developing between Youji and the demon Kanan. Her key relationship is with Youji, built on years of shared history, and through him she becomes indirectly connected to the series’ main events. Nadeko does not have any notable combat or magical powers; her function in the story is grounded in her ordinary human identity and her evolving interpersonal dynamics.