Kyouko Kamigamo, Jun Kamigamo's older sister, shares her sibling's modeling profession. During a rainy-day visit by Hajime Yasaka and Arashi to the Kamigamo residence, she observes Jun's attempts to conceal personal items reflecting her gender identity. Kyouko maintains a relaxed attitude toward household duties, contrasting with Jun's urgency in preserving appearances. She recounts a childhood anecdote about Jun's aversion to wedding dresses, contextualizing Jun's emotional reaction after accidentally wearing one during the visit. When Hajime discovers feminine undergarments in the refrigerator, Kyouko intervenes humorously, characterizing the appliance as a "sacred place for young girls" and implying an explanation would be appropriate when he is older. Her interactions primarily provide context for Jun's character development and family background.