Nanako Akiyama is a supporting character who appears as a close friend of Akane Segawa. After discovering that Akane plays the online game Legendary Age, she agrees to keep the secret and soon begins playing the game herself under the avatar name Sette. In the game, Sette is a summoner, often taking on a supportive role that mirrors her real‑life personality. Nanako is portrayed as a friendly, understanding, and slightly airheaded teenager with long pink hair, typically seen in her school uniform. In real life she can be shy and introverted, but through her interactions in the online world she becomes more confident and outgoing. Her primary motivation is to support her friends, both inside and outside the game, and she is always willing to help others without judgment. Her key relationship is with Akane, whom she has known for some time, and she also bonds with the other members of the Alley Cats guild. Throughout the story, Nanako’s involvement in the game helps her personal growth, allowing her to become more open and socially engaged. As a player, she is a capable summoner, but her greatest strength lies in her loyalty and caring nature, making her a dependable presence in the group.