Waiko (ワイコ; わいこ) is a voicebank for the UTAU program.


On January 2011, Yko released an UTAU named Waiko. Waiko's first cover was 'Melt' by supercell with a PV, but the video is private by now due to Yko's personal reasons. Her most known cover is Ievan Polkka, which reached 90K+ views on YouTube.

So far, Yko has released 5 of Waiko's voicebank, which is ACT1, ACT2.5, Sweet Append (on Waiko's first anniversary), Re-Dolce, and Forte. There are other Waiko's voicebanks that have yet to be released such as Adult, Plus, and NEXT(VCV). All of their release was postponed due to Yko's inactivity.

On 2015, Yko uploaded a new voicebank test of Waiko on SoundCloud and the voicebank is planned to be released on January 2021 as her 10th anniversary.

On December 2020, Yko finally released Waiko's Re-Dolce voicebank, with a cover of OSTER Project's Animal Crossing Bubblegum K.K. arrangement, along with Ui. On December 16th 2020, Waiko Forte was released along with Utaya's ACT3 with an MMD cover of GigaP's BRING IT ON.


Waiko's design is based on white, black, and orange, and is designed with the theme of "star" in mind.

Personality: Waiko is cool and calm. She can be a bit harsh and sometimes selfish but affectionate towards people she likes. Perfectionist and hates losing and easily gets jealous, but rarely shows it.

She drinks many bottles of milk and does sports (she's good at swimming) every day to get taller, but still remains short …

Despite her cool and calm attitude, she likes to sing girly songs and admires cute idol figures like Hatsune Miku.

Likes: Milk, games, dancing, and swimming

Dislikes: Being called short and flat-chested; being treated like a kid.


  • Waiko - ワイコ; taken from author's name, Y(wai)ko.
  • わいこ - The Hiragana rendition of her name.


  • Hair color - Black or reddish-black
  • Hair style - Long and straight, divided into two, sometimes curled at the end
  • Headgear - Black colored headphone with orange star symbol


Voice Configuration

Download on Waiko's official site 

Usage Clause

  • Avoid any mary-sues.
  • Please DO NOT make her as a PITCHLOID.
  • Do not make her singing anything offensive.

Certified true from Waiko's creator, Yko. Please do not change anything without Yko's permission.

  • For more detailed information, please visit Waiko's official site.


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