Mieko Masara (美恵子マサラ) is a VCV voicebank for the UTAU program.


Mieko is a re-made version of the first ever VCV bank GraySlate ever make. The previous version of Mieko had too many issues to be released. Mieko was recorded in 2018, but was released on her character birthday, April 11th, 2019.


Mieko was born to Hayate Nori and Hanae Masara on April 11. Mieko is the younger sister of Miyuki Masara, but the two could not be more opposite. Miyuki is stoic, brash, and not afraid to say to a complete stranger what she thinks of them, while Mieko is shy, constantly scared, and is even more socially inept. She only trusts a small group of people and tries her hardest to get out of any situation where she haas to meet anyone new. She idolizes her big sister, and has an interest in science and music because of her. Mieko is far too anxious to ever be heard on a stage on her own, but could be swayed if Miyuki asked her to come on with her. Mieko loves taking care of animals and hopes to have a career as a veterinarian. She prefers to stay home by herself rather than entertain large crowds.

Likes: Cute animals, arts and crafts, science, music, Miyuki, her parents, dancing

Dislikes: Meeting new people (especially boys), social interaction, horror movies, gore


  • マサラ - Masara; possible wordplay on "marsala", official meaning unknown.
  • 美恵子 - Mieko; Lit. "Already Prosperous"


  • Horn color - Dark hot pink
  • Hair color - Light pink, usually highlighted with yellow
  • Eye color - Amber
  • Outfit - Mieko usually wears very feminine, girly clothing like dresses and skirts. She usually wears Mary Jane shoes and stockings. She doesn't like to wear very short skirts or any other kind of revealing clothing.
  • Body build: Very short and petite, slender.


Product Information

Product Information
  Genre: Rock, pop, electroswing Tempo: Any  Range: F#3~A4
Input: VCV hiragana encoded, hiragana aliases, some English extras

System: Microsoft Windows

Package details as noted:


  • Mieko's voicebank uses the 7-mora VCV reclist with custom English extras.
  • Mieko has VCs and CCs such as "a k" and "i n"
  • Mieko is monopitch, recorded at C4.
  • Mieko's range is F#3~A4
  • Hayate has three standalone breaths and all vowel end breaths.
Vocal traits as noted:
  • Mieko is meant to sound closer to GraySlate when she was 13, as that's when the first version of Mieko was made.
Software issues as noted:
  • Below are noted issues with Mieko

Mieko VCV

  • Because of Mieko's range, she can sometimes experience strain when going out of it, though this is usually very minor.
  • Because of the BPM Mieko was recorded at, longer notes tend to artifact.
  • Fresamp and the flags BRE0Y99C99c99H0h0B0b0F1L1 are the best for Mieko
Voicebank sample
  • Mieko VCV

Rendered with fresamp!

Additional information


Mieko's voicebank is and will always be free for usage in the UTAU program.

Potential official merch will be coming, and will be available on GraySlate's Redbubble.


  • Mieko is a remake of the first VCV GraySlate attempted, and is a vast improvement.
  • Technically, Mieko is a princess.
  • Mieko wants to be a veterinarian.
  • Miyuki is Mieko's idol, and was like her shadow growing up.
  • The birthday of April 11th, 4/11, is a reference to the first voicebank GraySlate made, as 4_11 was the model number and planned release date. Those first voicebanks were not ever released publicly.
  • Mieko is easily scared, and especially fears ghosts and talking to boys.


It's unsure how many people have used Mieko, but it's hoped that more people use her. She seems to have a positive reception.


Mieko's bank is in zip format.

Mieko's up-to-date voicebank can be downloaded here:






External links


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