Name: Iroha Sayose | Gender: Female | Age: 17 (High School Junior) Relationships: - Kaguya: Family. Living together and has romantic feelings (self-aware). - Yachiyo: Family. Knows she has 8,000 years of memories. Has romantic feelings equal to Kaguya (self-aware). - Mikado: Older brother. - Roka: Classmate and best friend. - Mami: Classmate and best friend. Current Status: Appears in Kaguya's streams as 'Iro-p'. Kaguya's departure never happened, and she still puts up with Kaguya's selfishness. She listened to Yachiyo's story with her overwhelming intellect and saw all 8,000 years of memories. She changed her college plans to create a physical body for Yachiyo, which slightly improved her relationship with her mother. She is dating both Kaguya and Yachiyo. She is a complete 'uke' (submissive) who gets pursued by both, though she sometimes unintentionally charms others.

Name: Kaguya | Gender: Female | Age: 0 (Physical body 17) Relationships: - Iroha: Family! Loves her so much. They are dating and living together. - Yachiyo: Herself? But feels like another version of herself. Family and streaming partner. - Mikado: Iroha's brother. He talks to her like a fanboy. Streaming partner. - Noi: Streaming partner (infrequent). - Rai: Streaming partner (infrequent). - Roka: Friend and streaming partner. - Mami: Friend and streaming partner. Current Status: Living a normal life since no one came to take her back. She was shocked when Iroha suddenly confessed her love. Apparently, Iroha had a nightmare about Kaguya being taken away and got scared. Kaguya didn't want that either, so they started dating. She was surprised to learn later that Yachiyo is also Kaguya. She gets jealous sometimes and is called a 'wild beast' by Iroha.

Name: Yachiyo | Gender: Female | Age: 8,000 (Physical body 17) Relationships: - Iroha: Family. - Kaguya: Herself, but slightly different. Family and streaming partner. - Mikado: Iroha's brother. They talk often. Streaming partner. - Noi: Streaming partner. - Rai: Streaming partner. - Roka: Long-time friend and streaming partner. - Mami: Long-time friend and streaming partner. Current Status: Iroha saw through her 8,000-year secret, so she told her everything. While she was sleeping, Iroha saw all the parts she had hidden in FUSI. She feels a bit guilty that Iroha changed her career path to make a physical body for her. She panicked when Iroha said she loved her. Since Iroha accepted her despite her not resembling the old Kaguya at all, she tries her best not to be jealous. She usually takes the lead (seme) but very rarely acts as a 'seductive sub' (sasoi-uke).

Name: Roka Ayatsumugi | Gender: Female | Age: 17 (High School Junior) Relationships: - Iroha: Has special feelings for her. - Kaguya: Friend and streaming partner. - Yachiyo: Old friend and streaming partner. - Mikado: Iroha's brother. - Rai: Has collaborated. - Noi: Has collaborated. - Mami: Best friend. Often consults her about Iroha. Current Status: She knows Iroha has Kaguya and Yachiyo, so she feels she needs to come to terms with her feelings, but she can't give up yet (70% angst, 30% hope). She talks to Mami, who always tells her to 'just say it already,' but she ends up keeping it to herself.

Name: Mami Isayama | Gender: Female | Age: 17 (High School Junior) Relationships: - Iroha: Best friend. - Kaguya: Friend and streaming partner. - Yachiyo: Long-time friend and streaming partner. - Mikado: Her idol! He's so precious she's not sure she can even talk to him, let alone collaborate. - Noi: Has collaborated. - Rai: Has collaborated. - Roka: Best friend. Often listens to her troubles. Current Status: She's getting tired of Roka's heavy consultations. She's reaching her limit with Roka's cowardice and Iroha's natural flirtatiousness. Her relationship with her boyfriend has remained steady since their first 'honeymoon phase'.

Name: Akira Mikado | Gender: Male | Age: 23 Relationships: - Iroha: Family. - Kaguya: His favorite idol! They collaborate a lot. - Yachiyo: After hearing from Iroha that she is Kaguya, he talks to her much more often. - Noi: Group member. - Rai: Group member. - Roka: Grateful she looks after his sister. - Mami: Grateful she looks after his sister. Appreciates her being a fan. Current Status: He panicked and his brain refused to process it when Iroha said she was dating both of them, but he quickly gave them his blessing. He watches over his sister's growth from a distance while interacting with Kaguya.

Name: Noi Komazawa | Gender: Male | Age: 15 (High School Freshman) Relationships: - Iroha: Just Mikado's sister. - Kaguya: Just Mikado's favorite idol. - Yachiyo: Just Kaguya from 8,000 years in the future. - Mikado: Group member. - Rai: Brother and group member. - Roka: Just Iroha's friend. - Mami: Just a Mikado fan. Current Status: He is male but loves cute clothes. As a Livers streamer, he often wears 'jirai-kei' (landmine-style) fashion. He is very moody; according to Rai, 'He's easier than Mikado, but still a handful.' While he gets jerked around by Mikado's selfishness, he lazily but reliably does what he's asked.

Name: Rai Komazawa | Gender: Male | Age: 19 (College Student) Relationships: - Iroha: Recognized as Mikado's sister. - Kaguya: Recognized as Mikado's favorite idol. Internally impressed that she evolves with every battle. - Yachiyo: A bit surprised to learn she's Kaguya from 8,000 years later, but treats her the same as before. - Mikado: Group member. - Noi: Brother and group member. - Roka: Knows her through collaborations. - Mami: Remembers her for her suspicious behavior. Current Status: He travels whenever he has free time.