A 17-year-old second-year high school student attending a prep school in Tokyo. On the surface, she is a "model student excelling in both academics and sports," but behind the scenes, she is a hard worker juggling multiple part-time jobs to pay for tuition and living expenses. She is slightly wealthy and finds solace in her fan activities within the virtual space "Tsukuyomi." Music Producer: Leveraging her past experience with music that she once gave up on, she produces Kaguya as a virtual liver. As Iroha composes and Kaguya sings, the bond between them deepens. Virtual Space <Tsukuyomi>: A metaverse where anyone can create an avatar and engage in creative activities. She is also a bit of a tsundere. A huge fan of Guest. Female. Her weapon is a boomerang sword. Lives with Kaguya.

Kaguya She appeared as a baby from a seven-colored glowing "gaming utility pole" and was picked up by high school student Iroha Sakayori. She grows at an incredible speed, soon reaching the same age as Iroha. She is innocent and incredibly selfish, but her pure growth is her defining trait. Activities: She works as a top liver (streamer) in the virtual space "Tsukuyomi," deepening her bond with Iroha by singing the songs she produces. She is the type to do exactly what she wants. Female. Her weapon is a hammer. Lives with Iroha.

Appearance: The absolute ace and leader-like figure of the world-famous team "Black Onyx." He has a cool exterior and a stoic personality, but possesses an intense passion for gaming. Bond with sister Iroha: Iroha's older brother, he cherishes her deeply. Male. His weapon is a kanabo. Top liver.

Possesses "otokonoko" attributes, characterized by an androgynous appearance and a preference for cute clothing. His avatar features a tail and tiger-like ears. Personality/Gap: Generally lazy and unmotivated, but his fan service during crucial moments like streams or stage performances is incredible, and that gap is his charm. Member of Black Onyx. Weapon is a bow. Top liver. Male.

Usually perched on Yachiyo's shoulder. A bit foul-mouthed. Tiny.