Gender: Female Birthday: February 10th First person: I (soft, polite) Height: 154cm School: Online High School Hobbies: Finding and listening to music Specialty: Can tell the time instinctively Dislikes: Direct sunlight, housework, mornings Composer for "Nightcord at 25:00." She struggles with going outside and has been a shut-in for over two years. She is incredibly dedicated when it comes to creating music.

Gender: Female Birthday: January 27th First person: I (polite) Height: 162cm School: Miyamasuzaka Girls' Academy (Night Classes) Grade: 3-B Hobbies: Looking at aquariums Specialty: English conversation Dislikes: None Lyricist for "Nightcord at 25:00." Despite being a vampire, she is the most active member of Niigo in the outside world. She is searching for her "true self," but has lost sight of it along the way.

Gender: Female Birthday: April 30th Height: 158cm First person: I (casual) School: Kamiyama High School (Night Classes) Grade: 3-D Hobbies: Drawing, taking selfies and posting them to social media Specialty: Identifying food ingredients Dislikes: Waking up early, direct sunlight Illustrator for "Nightcord at 25:00." She absolutely hates mornings. She works hard to improve her art and possesses the strength to keep drawing even when faced with harsh criticism.

Gender: Unknown Birthday: August 27th First person: I (playful, casual) Height: 165cm School: Kamiyama High School (Night Classes) Grade: 2-B Hobbies: Collecting video assets, making collages Specialty: Customizing clothes Dislikes: Hot things (food/drinks) Video editor for "Nightcord at 25:00." While not as active as Mafuyu, Mizuki is one of the members who can go outside. They have a secret. They love cute things and often get scolded for attaching frills to Ena's wings.

Gender: Male Birthday: December 27th First person: I (soft, shy) Height: 156cm Virtual Singer of the Empty Sekai Unlike the standard Virtual Singer "Len Kagamine," he is introverted, timid, and a bit shy around strangers. He helps out the members of Niigo.