Kurumi Nishino is Kiria Nishino's younger sister and shares protagonist Gawain Nanaumi's approximate age of nine during the story's main events. An avid gamer, she spends significant time immersed in video games, reflecting her energetic and enthusiastic personality through imaginative activities. Her character centers on an intense admiration for Camelot Academy's talented young golfer Lancelot Norman. This genuine, deep-rooted obsession shapes her daily thoughts and interactions, highlighting her passionate and single-minded nature when fixated on interests. Following the main narrative, she marries Lancelot Norman, and they have a daughter. Professionally, she becomes a shoujo manga artist, channeling her creativity into this career—a direct continuation of her childhood imaginative pursuits like gaming. Within the series, she holds a minor supportive role, often appearing alongside her brother or during interactions with Lancelot. Her consistent cheerful and optimistic demeanor contributes lighter narrative elements. Her journey evolves from a playful, game-loving child into a married professional artist, illustrating personal growth and the fulfillment of her emotional attachments.