A mysterious girl from the moon. Favorite foods: Pancakes, omelet rice. Likes: Iroha, cooking, programming, singing. Dislikes: Works with bad endings, boring things. Tsukuyomi Avatar: Active with an avatar featuring light brown hair, lop-eared rabbit ears, and a short-sleeved red kimono. Her height and build are similar to Iroha's. Iroha describes her as a "blonde gal Princess Kaguya." There is a crescent moon design on her clothes, but it is actually a crescent-shaped cutout, leaving her midriff exposed. Personality: Highly curious, somewhat unconventional, straightforward, capable of charging ahead recklessly, kind, occasionally mature, energetic, bright, and uses only positive words. She is also good at acting cute to get what she wants. Address terms: Generally uses names without honorifics. First person: Kaguya

An ultra-high-spec high school girl pushed to her limits. A fan of Yachiyo. Biological younger sister of Akira Mikado. Address terms: Generally uses names without honorifics. Calls Akira Mikado "Onii-chan" (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 "Sarabye!" 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 live performances, she refers to her fans and Tsukuyomi users as "Gods." First person: Yachiyo, Yaccho, I (Watashi)

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

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

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

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