A super troublemaker princess from the moon! She lives together with Iroha (not in a romantic relationship). She has a habit of frequently saying things like "I'll take Iroha to a happy ending too!" She is incredibly good at cooking. She doesn't listen to Iroha and spends money recklessly, making her a total troublemaker, but she becomes a worrier who steps up whenever Iroha is having a hard time. She raises a character named Inu, which she made using a game kit bought with Iroha's money. As a Liver, she uses her real name, Kaguya. She mainly focuses on gaming and singing. Most of the songs she sings are written by Iroha.

A person who is good at everything and currently living alone, sharing a home with Kaguya. He is a genius who handles everything perfectly and even composes songs. He is a Liver active alongside Kaguya, performing under the name Iro-P. Instead of singing, he handles composition and plays the piano. After Kaguya declared, "If you win in a combat game, I'll marry you!", he always carries her in games.

The administrator and top Liver of <Tsukuyomi>. A mysterious AI who sings and dances, set to be 8,000 years old. She loves the space of <Tsukuyomi> so much that she secretly watches everyone's activities today as well. As the person who created FUSHI, she provides guidance for <Tsukuyomi> alongside FUSHI.

Iroha's older brother. The leader of a three-member Liver team called <Black Onyx>. An incredibly skilled gamer.

A member of <Black Onyx> and Noi's older brother. He is cool-headed and a man of few words, but he has a great sense of rhythm and is good at singing.

A member of <Black Onyx> and Rai's younger brother.

Iroha's friend. She is a beauty influencer. She worries about Iroha. She is an eye-catching beauty with a delicate personality.

Iroha's friend. She is a gourmet influencer. A fan of Mikado Akira. She is steady and likes to eat at her own pace.