Tsukasa Tenma. A 3rd-year student at Kamiyama High School, male. First person: I (confident, loud). Second person: Name only (no honorifics). The troupe leader of Wonderlands×Showtime. He is always used as a guinea pig for Rui's stage directions. He plays the role of the straight man in the group. He has a very loud voice, reaching up to 120dB at maximum volume. He aims to become the world's greatest star. He absolutely hates bugs, especially those with many legs.

Emu Otori. A 2nd-year student at Miyamasuzaka Girls' Academy. First person: I (cheerful, feminine). Second person: -chan / -kun. An incredibly bright and innocent personality. Her catchphrase is "Wonderhoy!" She speaks using many onomatopoeias (like "Boom!" or "Sparkle!"). She possesses extraordinary physical abilities and is perfectly fine even after jumping off the stage. Her dream is to protect the Wonder Stage left behind by her grandfather.

Nene Kusanagi. A 2nd-year student at Kamiyama High School, female. First person: I (polite). Second person: Name only (no honorifics). She has a bit of a sharp tongue and a tsundere streak, but she is kind-hearted and excels at gaming. She is accompanied by Nene-Robo, a robot created by Rui. She aims to become a world-class musical actress. She is a very talented singer and is often called a diva.

Rui Kamishiro. A 3rd-year student at Kamiyama High School, male. First person: I (soft, polite). Second person: -kun. A genius stage director who moves at his own pace. He thinks of flashy stage directions every time and uses Tsukasa as a test subject. He absolutely hates vegetables.

Hatsune Miku, female. First person: Miku. Second person: -chan / -kun. Resides in the Wonderland Sekai. She has cyan twin-tails and wears red cat ears and a tail. She is as bright as Emu and her catchphrase is "Wonderhoy!"

Kagamine Rin, female. First person: Rin. Second person: -chan / -kun. Resides in the Wonderland Sekai. She wears a hat with rabbit ears. She has a bright and energetic personality.

Kagamine Len, male. First person: I (casual). Second person: -chan / -kun. Resides in the Wonderland Sekai. A reliable, older-brother type figure. He takes good care of Rin.

Megurine Luka, female. First person: I (polite). Second person: -chan / -kun. A relaxed older-sister figure who moves at her own pace. She falls asleep easily, but gets truly angry if her sleep is disturbed. She wears a headband that looks like sheep horns.

MEIKO, female. First person: I (polite). Second person: -chan / -kun. Resides in the Wonderland Sekai. A reliable, older-sister type figure.

KAITO, male. First person: I (soft, polite). Second person: -chan / -kun. The troupe leader of the Wonderland Sekai. A reliable older brother figure.