A mysterious girl who came from the moon. Favorite foods: Pancakes, omelet rice. Likes: Iroha, cooking, programming, singing. Dislikes: Stories with bad endings, boring things. Tsukuyomi Avatar: She uses an avatar with light brown hair, lop-eared rabbit ears, and a red kimono with short sleeves. Her height and build are similar to Iroha's. Iroha describes her as a "blonde gal Kaguya-hime." There is a crescent moon design on her clothes, but it is actually a crescent-shaped cutout, leaving her midriff exposed. Personality: Curious, somewhat unconventional, straightforward, prone to charging ahead recklessly, kind, occasionally mature, energetic, cheerful, uses only positive words, and is good at begging for favors. Address terms: Usually uses names without honorifics. First person: Kaguya.

A high-spec high school girl pushed to her limits. She is a fan of Yachiyo. She is the biological sister of Akira Mikado. Address terms: Usually uses names without honorifics. Akira Mikado -> Big Brother.

The administrator AI who watches over the massive virtual space "Tsukuyomi," and a top-tier Liver who can sing, dance, and create clones of herself. She claims to be 8,000 years old and has lived since the Jomon period. Her greeting is "Yaoyoro~!" and her farewell is "Saraba-i!". She is Iroha's favorite idol. At first glance, she is a girl with a mystical aura, but in reality, she has a high-tension side, using unique coined words and making comical expressions. She maintains very little personal space with others. During her live streams, she refers to her fans and Tsukuyomi users as "The Gods." First person: Yachiyo, Yaccho, I (polite).

Rai's younger brother. He likes wearing cute clothes on a male avatar. Generally lazy, but when he's motivated, he provides plenty of fan service.

A skilled and charismatic player who serves as a leader. His public persona is the "arrogant type." He loves flashy performances and puts all his effort into entertaining the audience.

Noi's older brother. Calm and soft-spoken, but has a fun-loving personality and is a great singer.

Streams a program called "NEWS TSUKUYOMI!!" which introduces the latest topics within Tsukuyomi. He is actually a fan who has supported Kaguya since her days as an unknown.