Rui Kamishiro is a tall, eccentric student from Kamiyama High School who serves as the brilliant director, actor, and resident inventor for the musical troupe Wonderlands×Showtime. Known for his clever mind, love for theatrical shows, and knack for building complex robots, his outlandish ideas often lead others to view him as a quirky weirdo. Appearance-wise, Rui stands at around 180–182 cm and is recognized by his uneven, choppy light-purple hair featuring two bold cyan/light-blue streaks, paired with a small cyan stud piercing in his right ear. He has sharp, yellow/amber eyes framed by subtle reddish accents at the outer corners, and he is almost always sporting a cat-like smirk. His vibrant aesthetic often extends to his stage wear—such as his distinctive long, asymmetrical tailcoat paired with gloves—reflecting both his dramatic, showman persona and his colorful, theatrical flair.

Nene Kusanagi is a talented, introverted student from Kamiyama High School who acts as the lead singer and actress for Wonderlands×Showtime. Despite possessing a powerful, breathtaking singing voice and exceptional musical theater talents, she suffers from severe stage fright, often relying on her custom robot, "Nene-Robo," to perform on stage in her place during the troupe's early shows. Appearance-wise, Nene is short (around 156 cm) with soft, light green hair cut into a shoulder-length bob with curved bangs, usually tied into two low, tiny pigtails with teal ribbons, while two prominent strands frame the sides of her face. She has round, bright purple eyes, pale skin, and a generally quiet, subdued expression that reflects her shy, reserved, and deadpan nature, though her expressive eyes often reveal her hidden warmth and fierce dedication to her troupe.

Emu Otori is an exceptionally energetic, cheerful, and optimistic student from Miyamasuzaka Girls Academy who serves as a core performer for Wonderlands×Showtime. Driven by her deep connection to the Phoenix Wonderland theme park—founded by her grandfather—she is on a tireless mission to make everyone in the world smile, often bursting with wild enthusiasm and expressing her excitement with her signature catchphrase, "Wonderhoy!" Appearance-wise, Emu is short at 152 cm and easily recognizable by her soft, bubblegum-pink hair cut into a short, slightly messy bob with curved bangs framing her face. She has large, luminous bright pink/magenta eyes, pale skin, and a constant, beaming smile that perfectly matches her high-spirited, acrobatic nature. Her aesthetic is vibrant and colorful, typically featured in a modified Phoenix Wonderland staff uniform or lively stage costumes that reflect her boundlessly sweet and theatrical personality.