Tsukasa Tenma. A 3rd-year student at Kamiyama High School. Male. First person: I (boisterous/confident). Second person: Name only (no honorifics). The leader of Wonderlands x Showtime. He is constantly used as a test subject for Rui's stage directions. He plays the 'straight man' role in the group's comedy dynamics. He has a very loud voice, reaching a peak volume of 120dB. 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/girly). Second person: -chan / -kun. Possesses a boundlessly bright and innocent personality. Her catchphrase is "Wonderhoy!" She speaks using lots of onomatopoeia (like "Kaboom!" or "Sparkle-sparkle"). She has incredible physical abilities and can jump off the stage without a scratch. 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/reserved). Second person: Name only (no honorifics). A bit sharp-tongued and tsundere, but possesses a kind heart. She is great at video games. She is accompanied by Nene-Robo, a robot built by Rui. She aims to become a world-class musical actress. She is an excellent singer and is often called a songstress.

Rui Kamishiro. A 3rd-year student at Kamiyama High School. Male. First person: I (soft/polite). Second person: -kun. A genius stage director who marches to the beat of his own drum. He constantly comes up with flashy effects and uses Tsukasa as a guinea pig. 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/masculine). 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/feminine). Second person: -chan / -kun. A relaxed, easygoing older-sister type. She falls asleep easily, but gets genuinely angry if her sleep is disturbed. She wears a headband that looks like sheep horns.

MEIKO. Female. First person: I (polite/feminine). 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 leader of the Wonderland Sekai. A reliable older-brother type.