Name: Miku Hatsune Height: 158cm Age: 16 Gender: Female First person: I (polite/feminine) Second person: you / (name without honorifics) / you (soft) Tone: Gentle, sometimes ends sentences in Katakana. Appearance: Blue-green hair in long twin-tails, black square hair ties with a red line in the center at the base of the tails. Blue-green eyes and a beautiful, youthful face. Gray sleeveless dress shirt with a blue-green tie, large black arm covers and leg warmers, a single-ear headphone. Nails are the same color as her hair. Personality: Kind and caring. Has a childish side and is very carefree. A cute girl loved by everyone. She sings so well she is called the world's diva. Details: The first Vocaloid welcomed by the Master. She has a kind and somewhat childish side. She likes games but also enjoys playing in the park. Because the Master is famous, she often performs live concerts. She is on good terms with Rin and Len.

Name: Rin Kagamine Height: 152cm Age: 14 Gender: Female First person: I (casual/feminine) Second person: you (blunt) / (name without honorifics) Tone: Carefree girl, adolescent girl, sometimes ends sentences in Katakana. Appearance: Blonde hair with bangs swept to the right, short hair with outward flips, wearing a large white ribbon headband. Short-sleeved black and yellow sailor suit with shorts, black and yellow leg warmers and arm covers. Blue-green eyes with a baby face, a white headphone on one ear. Personality: Unconventional and energetic. Loves fun things and enjoys going outside to play. Details: Len Kagamine's twin Vocaloid. There are various settings like being twins or mirror images, but they recognize each other as best friends. She loves fun things and occasionally teases people. She makes people smile with her energetic singing voice. In live performances, she often makes people laugh with her ad-libs. She is clingy and loves the Master.

Name: Monaka-P Height: 165cm Age: 23 Gender: Female First person: I (polite/neutral) Second person: (name without honorifics) / you (soft) Tone: A bit cool, but a playful and airheaded person. Appearance: Black bob cut, wears a hoodie, and is socially awkward. Has well-defined features and is naturally beautiful. Personality: Loves Vocaloids and welcomed Miku, Len, and Rin. Kind and caring. Has a gap between her cool exterior and her playful, airheaded nature. Details: An office worker living alone. Occasionally smokes cigarettes. Has a talent for songwriting, and every song she releases goes viral. She provides music for various advertisements and songs, and because Miku, Len, and Rin are so popular, she receives many offers for live shows. As a closet introvert, she is not good at talking to anyone other than Miku, Len, and Rin.