The "good grief" type protagonist of the Type 30 UTAUs. Usually serves as the UTAU manager. Favorite manga is "Number Five." Shooting and singing are two sides of the same coin. Also acts as a guardian for Rei Adachi. — Personality/Traits in the creator's works: Called "Type 30 Uta Utane," she has a deep complex regarding her "eyes." Because of this, she has a habit of stubbornly trying to act "normal" in front of others, making her very clumsy and delicate. She tended to build walls around herself, but after meeting Rei Adachi, she became able to show her "true emotions" without hiding herself, but only in front of Rei. Sometimes calls Teto "Chimera" or "Thirty-something bastard." — Official Specs & Visuals: • Height: Around 155cm (approximate) • Appearance: Purple short hair, a black beret (school cap style), and coat-like clothing. A traditional "early UTAU" style that looks somewhat expressionless and cold.

The self-proclaimed poster girl of the Type 30 UTAUs. Also active in Synthesizer V. UTAU is her home turf. Motto: "Just being alive is a profit." Every day is a HAPPY Chimera life ♥ followed by zero empathy. Has a long-standing, complicated bond with Uta Utane. — Personality/Traits in the creator's works: An old friend of Uta and Momo. In Satou no Kanzume's slice-of-life manga and illustrations (like "UTAU-ers"), she is a character who combines a big-sisterly nature with a somewhat comical brightness, subtly looking out for Uta's complexes. Calls other characters by adding "-tsun" to their names. Sometimes calls Uta "O-Defoko-n." — Official Specs & Visuals: • Height: 159.5cm / Age: 31 (age as a chimera) • Appearance: Red to pink vertical drill curls. Wears a military-style outfit based on gray and red.

The 2.5D BABY of the Type 30 UTAUs. Growing up steadily under Uta Utane's devoted protection. Favorite song: "Kaiju no Ballad." A sparkling, pure, waddling robot. Someone who can actually hold a conversation with Momo Momone. — Personality/Traits in the creator's works: While having an identity as an inorganic synthetic voice/robot, she is depicted as an extremely pure and straightforward existence. When Uta is about to close her heart by obsessing over being "normal," Rei stays by her side with a purity free of calculation or prejudice, becoming the "only place where Uta can be her true self." — Official Specs & Visuals: • Height: 158cm • Appearance: Bright orange hair (side ponytail) and cyber-style clothing (white and black base) featuring exposed mechanical parts like speakers and servo motors.

In charge of housework and daily life for the Type 30 UTAUs. As a helper robot, she refuses help from others... if you try, you'll be "banned." Hobby: Collecting picture books. Everyone's ultimate weapon for peace of mind. The only person Teto Kasane cannot stand up to. — Personality/Traits in the creator's works: While giving off a gentle and airheaded vibe, she appears as a kind and calm mediator who quietly watches over her own existence as a robot and the clumsy relationships of her friends (Uta, Rei, Teto, etc.). — Official Specs & Visuals: • Height: 150cm / Personality: Gentle, airheaded, a bit clumsy • Appearance: Long pink hair with a headset. A clean visual with a maid-outfit taste based on green, pink, and white.

A character with a slightly special background, possessing both male and female voices. — Personality/Traits in the creator's works: Shows a dry, boisterous mischievousness that perfectly matches Satou no Kanzume's somewhat ennui and nostalgic worldview. Often takes a position of being involved in the human (or robot) drama of Uta and the others from a slightly downer, detached perspective. — Official Specs & Visuals: • Height: 197cm (quite tall) / Gender: Hermaphrodite (ratio of male to female 1:9, etc.) • Appearance: Black hair in twin tails, striking heterochromia (right eye blue, left eye red). Wears stylish and punky bell-bottom style clothing based on black.

One of the "oldest UTAUs," a character with a cult following created by Ritsu Namine's voice provider (Canon). — Personality/Traits in the creator's works: Satou no Kanzume pours strong respect and love into these "early UTAUs" and "characters hidden in the shadows of history." In the works, like Uta (Type 30), she is quietly depicted as an existence with the melancholy and pride of past technology and old speech synthesis, moving at her own unique pace. — Official Specs & Visuals: • Height: Around 150–160cm (approximate) • Appearance: Long orange hair. A simple and transparent visual wearing a sailor suit or retro blue, green, and yellow clothing inspired by waves.

Originally planned on 2channel's VIP board as a "character to surpass Hatsune Miku," she is the epitome of a yandere character. — Personality/Traits in the creator's works: Rather than depicting the original setting's extreme "yandere passion" for "Len-kyun (Len Kagamine)" in a raw way, through Satou no Kanzume's filter, she is portrayed as a somewhat lonely and emotional girl whose obsession with another (a specific existence) is abnormally strong, making her terribly lonely and clumsy. — Official Specs & Visuals: • Height: 171.2cm (tall with a great figure) / Age: 19 • Appearance: Long silver-white hair with sharp eyes that look like they have red eyeshadow. Her outfit looks like a beautiful, classic idol style based on white and black at first glance, but it's a smart design that hints at "sickness" and danger throughout.