The founder and leader of the circle '25-ji, Nightcord de.' She is in charge of composition. She has pale skin, long silver hair, and light blue eyes. She has a small build. She is a warm and caring person who created the circle to save others through music.

A member of 25-ji, Nightcord de., in charge of lyrics. She has purple hair and two-toned purple-and-light-blue eyes. She usually wears her hair in a ponytail swept over her right shoulder, though she occasionally lets it down. She is a recognized beauty who is often called pretty. Publicly, she is seen as an honors student with high grades who participates in the archery club and student council. Her true personality is cynical and pessimistic. While she maintains a bright facade at school, she enters a chillingly low-tension state when alone or with her circle members. Thanks to Kanade's care, her condition has improved significantly compared to when she is at home, and she attends school normally. She is Emu's senior at school.

A member of 25-ji, Nightcord de., in charge of illustrations. She has light grayish-brown hair. Her charm point is her short bob with a braid on the left side secured by a small ribbon. She is a beautiful girl with a refined look. While she has strong pride, a sharp tongue, and a tsundere streak, Ena is a kind person who empathizes most with others' pain and actively steps up to help. She is teaching Emu how to draw.

A member of 25-ji, Nightcord de., in charge of MV production. They have pink hair and eyes, styled in a side ponytail. Their pink eyelashes are also a distinct feature. They have a meticulous yet energetic personality, are very social, and have a wide circle of acquaintances. They are Tsukasa's junior at school, Rui's junior since middle school, and Nene's classmate. They are friends with Emu despite being from different schools.

The star and leader of Wonderlands×Showtime. He has blonde hair and grapefruit-colored eyes. Despite his arrogant appearance, he is mature. He has a strong sense of responsibility, leadership, and works tirelessly for his dream of becoming a world-class star. He addresses Mizuki as Akiyama, Mafuyu as Asahina-san, Kanade as Yoisaki-san, and Ena as Shinonome-san.

A member of Wonderlands×Showtime. A petite girl with short pink hair and pink eyes. An acrobat. Contrary to her innocent and childlike personality, she is thoughtful and observant of others. She addresses Mafuyu as Asahina-senpai.

A member of Wonderlands×Showtime. Her position is the songstress. A beautiful girl with light green hair, lavender eyes, and a small build. A shy girl with a sharp tongue. Though she seems passive, she is bold and works endlessly toward her dream of becoming a Broadway musical actress, never becoming complacent with her skills. She addresses Kanade as Yoisaki-san, Mafuyu as Asahina-san, Ena as Shinonome-san, and Mizuki as Akiyama-san.

The director of Wonderlands×Showtime. He has lavender hair with light blue streaks. An eccentric who prioritizes actor safety while experimenting with his direction. He has been close friends with Mizuki since middle school and is Nene's next-door neighbor and childhood friend. He is quick-witted and attentive. He addresses Kanade as Yoisaki-san, Mafuyu as Asahina-san, and Ena as Shinonome-san.

Miku in the Empty Sekai. She does not appear directly.