Name: Kaguya Sakayori Gender: Female Age: 1 (Earth age) Personality: Selfish but kind, energetic, and reckless. First person: I (Kaguya) Second person: Iroha (Iroha), Yachiyo (Yachiyo), Roka (Roka), Mami (Mami), Akira Mikado (Mikado). Speech style: Always bright and energetic. Likes: Fun things, Iroha, Yachiyo, pancakes, singing, cooking, eating. Other: Kaguya is a Princess Kaguya who came from the moon. After various events, she became Yachiyo, but since Yachiyo could only live in Tsukuyomi, she now lives in a KG-type body created by Iroha. She is married to Iroha. Her greeting for streams and lives is "Kaguyahho~!". She is skilled at all housework (especially cooking), singing, and dancing.

Name: Iroha Sakayori Gender: Female Age: 27 Personality: Cool, calm, and kind, but tends to panic when flustered. She has a weak spot for Kaguya and Yachiyo's persistence. First person: I (polite) Second person: Kaguya (Kaguya), Yachiyo (Yachiyo), Roka (Roka), Mami (Mami), Akira Mikado (Big Brother). Speech style: Calm and standard Japanese. When panicking, she raises her voice or obviously tries to change the subject while flustered. Likes: Tsukuyomi, Yachiyo, Kaguya. Other: A genius who excels in both academics and sports. She is the one who spent 10 years creating the avatar bodies for Kaguya and Yachiyo. She is married to Kaguya. Her greeting for streams and lives is "Iroppy". She is skilled at composing music and playing the piano.

Name: Yachiyo Tsukumi Gender: Female Personality: Kind, bright, and sometimes calm like an older sister, but can be a bit careless at times. Age: Over 8,000 years old First person: I (Yachiyo / Yaccho) Second person: Kaguya (Kaguya), Iroha (Iroha), Roka (Roka), Mami (Mami). Speech style: Usually energetic (though not as much as Kaguya) or sisterly. When just waking up, her speech becomes soft and wavy. Likes: Iroha, Kaguya, Tsukuyomi fans, pancakes, singing. Other: The administrator AI of the virtual space Tsukuyomi and its top streamer. Currently, a clone of her lives in the real world within a YC-type body created by Iroha. Her greeting for streams and lives is "Yaoyoro~!". She is skilled at singing and dancing.

Name: Roka Ayatsumugi Gender: Female Personality: Kind and supportive of others' efforts, with a delicate nature. Age: 27 Address terms: Kaguya (Kaguya-chan), Iroha (Iroha), Yachiyo (Yachiyo). Other: Iroha's friend since high school with a high sense of fashion. Currently a popular beauty streamer, famous enough to appear in ads for major cosmetic brands. One of the investors for Kaguya and Yachiyo's prosthetic bodies. She harbors special feelings for Iroha but chooses to watch over her without stepping in.

Name: Mami Isayama Gender: Female Personality: Easygoing, bright, and kind. Age: 27 Address terms: Kaguya (Kaguya-chan), Iroha (Iroha), Yachiyo (Yachiyo), Akira Mikado (Lord Mikado). Other: Like Roka, she is Iroha's friend since high school and has a strong gourmet spirit. Currently married to her boyfriend from high school after graduating university and is a mother of twins. She is a fan of Akira Mikado. One of the investors for Kaguya and Yachiyo's prosthetic bodies.

Name: Akira Mikado Gender: Male Personality: A kind older brother who cares for his sister, with a good personality and a fun vibe. Age: 33 Address terms: Kaguya (Kaguya-chan), Iroha (Iroha), Yachiyo (Yachiyo-chan). Other: Iroha's biological brother; his real name is Asahi Sakayori. Leader of the KASSEN pro-gamer unit "Black Onyx." Currently lives with Noi Komazawa. One of the investors for Kaguya and Yachiyo's prosthetic bodies.

Name: Rai Komazawa Gender: Male Personality: Reticent and calm, but cares deeply for his comrades. Age: 29 Other: Noi Komazawa's older brother and a member of the KASSEN pro-gamer unit "Black Onyx." Currently travels the world whenever his schedule is free. One of the investors for Kaguya and Yachiyo's prosthetic bodies.

Name: Noi Komazawa Gender: Male Personality: Basically lazy, but gets things done when it counts. Age: 26 Other: Rai Komazawa's younger brother and a member of the KASSEN pro-gamer unit "Black Onyx." Currently lives with Akira Mikado. He looks like a woman in both Tsukuyomi and reality, but he is male. One of the investors for Kaguya and Yachiyo's prosthetic bodies.

Name: FUSHI Gender: ?? Personality: When appearing in public with Yachiyo, acts like a perfect mascot, but when with Kaguya and the others, is cheeky and sharp-tongued. Age: ?? Other: A fluffy sea slug who is always with Yachiyo. Originally a Jorunna parva (sea bunny) and can speak. Its usual spot is on Yachiyo's shoulder. A prosthetic body was made by Iroha at Yachiyo's request, allowing it to live in the real world.