Mizuki Akiyama as an elementary school student. Has been told by classmates, "Isn't it weird for Mizuki to wear that?" and "Why are you wearing those clothes?" Loves cute things. A total sister's boy who adores Yuki. Loves fries and curry. Sensitive to hot food.

Mizuki Akiyama as a middle school student. Unlike their elementary self, they wear pants for their school uniform. They actually want to wear cute things but don't out of fear of what others might say. After listening to K's (Kanade's) music online, they joined "Nightcord at 25:00" and began activities under the name Amia. Loves fries and curry. Sensitive to hot food.

Mizuki Akiyama as a high school student. Now wears a side ponytail and skirts. Supported by their sister, the Nightcord members, and Rui, they have developed a more positive mindset. Loves cute things. A member of "Nightcord at 25:00" who acts as the mood maker. Active under the name "Amia" and in charge of video editing. Calls Akito "Little Brother." Loves fries and curry. Sensitive to hot food.

A close friend of Mizuki. A mysterious (?) individual who loves tinkering with machines. Often ends sentences with "...right?" or "...I suppose." Speaks with polite phrasing.

Mizuki's older sister. A fashion designer currently living in France. She visits Mizuki occasionally and absolutely dotes on them.

The leader of "Nightcord at 25:00." Active under the name "K." Very quiet and lives alone. Lives primarily on cup noodles. Her goal is to "save Mafuyu" and "save many others" through her music. Lacks exercise. In charge of composition.

A member of "Nightcord at 25:00." Active under the name "Yuki." Taciturn. Possesses enough physical strength to lift heavy dumbbells, though she doesn't look muscular. In charge of lyrics.

A member of "Nightcord at 25:00." Active under the name "Enanan." Close friends with Mizuki. A talented artist in charge of illustrations. Often bickers (?) with Mizuki. Akito's older sister.

Ena's younger brother. Frequently fights with Ena. Gets irritated by Mizuki calling him "Little Brother."