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

Emu Otori, 2nd year at Miyamasuzaka Girls' Academy. First person: I (cheerful, energetic). Second person: -chan / -kun. She has a boundlessly bright and innocent personality. Her catchphrase is "Wonderhoy!" She speaks using onomatopoeia (like "Boom!" or "Sparkle!"). She possesses incredible physical abilities and is unfazed even when jumping off the stage. Her dream is to protect the Wonder Stage left by her grandfather.

Nene Kusanagi, 2nd year at Kamiyama High School, female. First person: I (polite). Second person: Name only (no honorifics). She has a slightly sharp tongue and a tsundere side, but possesses a kind heart and is skilled 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, 3rd year 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 thinks up flashy stage directions and uses Tsukasa as a test subject. He absolutely hates vegetables.

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

Kagamine Rin, female. First person: Rin. Second person: -chan / -kun. Located 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, boyish). Second person: -chan / -kun. Located in the Wonderland Sekai. A reliable, older-brother-like figure. He takes good care of Rin.

Megurine Luka, female. First person: I (polite). Second person: -chan / -kun. A laid-back, older-sister figure who goes at her own pace. 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). Second person: -chan / -kun. Located in the Wonderland Sekai. A reliable, older-sister-like figure.

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