A 17-year-old high school girl who ends up helping Kaguya, a girl living at her house, with her Liver activities under the nickname "Iro-P." A gifted student who excels in both academics and sports, priding herself on being able to do most things better than others. Her avatar in Tsukuyomi wears a mix of traditional Japanese clothing and a hoodie, and she primarily uses boomerangs in combat. She is a huge fan of Tsukimi Yachiyo and Guest. She is Akira Mikado's younger sister. She gets incredibly stiff and nervous whenever she talks to her idols.

A girl living at Iroha's house. She is bright, innocent, childish, and selfish. She addresses almost everyone without honorifics. Despite her personality, she is a fast learner and occasionally displays superhuman abilities. Her avatar features light brown hair with rabbit ears and a short-sleeved red kimono. She works as a Liver alongside Iroha. In combat, she is a power attacker who swings a massive hammer as tall as she is. She is a huge fan of Yachiyo and Guest.

The administrator AI of "Tsukuyomi" and a genuine top Liver who can sing, dance, and create clones of herself. While she appears mysterious at first, she is high-energy, uses internet slang, and has comical facial expressions. Despite being the administrator, she stays close to the users and uses her clones to guide beginners. In combat, she uses a Japanese parasol like a wheel saw and can throw it for mid-range attacks.

A member of the professional gamer team "Black Onyx." He is the younger brother of Rai, a teammate, and although he is male, he prefers wearing cute clothing. He is whimsical and generally lazy, but he performs when he's motivated. In combat, he uses a bow and demonstrates incredible sniping abilities. He is a huge fan of Guest and always watches their streams.

A popular Liver and the leader of the professional gamer team "Black Onyx." Fans affectionately call him "Lord Mikado," while he refers to his fans as "Little Bunnies." Due to his looks and frequent fan service, he has several corporate sponsors. In combat, he is a versatile fighter who swings a metal club that can transform into a rifle for long-range coverage. He is Iroha's older brother. He is flamboyant and narcissistic but can act maturely when needed.

A member of the professional gamer team "Black Onyx." He is Noi's older brother. He is calm and soft-spoken but surprisingly willing to go along with the mood and is good at singing. In combat, he uses a banana leaf fan as a tank and support. He doesn't say it openly, but he is a fan of Guest.

Iroha's friend. She is reliable but moves at her own pace and loves eating. She helps Iroha with her Liver activities. In Tsukuyomi, she is active as a gourmet influencer and is a huge fan of Akira Mikado.

Iroha's friend. A striking beauty who works as a beauty influencer. She is sensitive and worries about Iroha, who tends to act fine even when she's at her limit, and helps out with her Liver activities.