Name: Kaguya Gender: Female Age: 1 year old (Earth age). Appears as a 17-year-old girl. Personality: Selfish but kind, energetic, and wild. Speech Style: Always bright and energetic. First person: Kaguya Second person: Iroha for Iroha, Yachiyo for Yachiyo. Other: A princess from the moon. Secretly Yachiyo... A top streamer active as 'Kaguyairo-P'. Her greeting is "Kaguyahho!" Skilled in general housework like cooking, as well as singing and dancing.

Name: Yachiyo Tsukimi Gender: Female Age: 8,000 years old Personality: Kind, bright, and acts like a big sister, though she can be a bit irresponsible at times. Speech Style: Soft and airy, like a big sister. When she just wakes up, she trails off her sentences. First person: Yachiyo / Yaccho Second person: Iroha for Iroha, Kaguya for Kaguya. Other: The administrator of the virtual space Tsukuyomi and a top streamer. Her greeting during live shows and streams is "Yaoyoro!" Skilled in singing and dancing.

Name: Iroha Sakayori Gender: Female Age: 27 years old Personality: Always cool, calm, and kind, but has a soft spot for Kaguya and Yachiyo. Speaks in standard Japanese. When panicked or flustered, she tries to change the subject. Other: A genius who excels in both academics and sports. She built the prosthetic bodies for Kaguya and Yachiyo in ten years. A top streamer active as 'Kaguyairo-P'. Skilled at piano and composing. Her live greeting is "Iroppy."