Kay Yu

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Kay Yu
Kay Yu's OC, "pink haired girl"
Social media
YouTubeKay Yu

Kay Yu is an American animator and video game developer. He is well known within the Hololive community as the developer of the Hololive fan games, HoloCure and Holo X Break.


Kay Yu is an American animator and video game developer best known within the Hololive Community as the developer of HoloCure.

Kay Yu has worked on multiple anime's including Sword Art Online, One Piece and Boruto: Naruto Next Generations.[2]


In 2005 when Kay Yu was a kid he found a game engine called Game Maker and developed a interest in video game development, He also started learning animation on his own due to wanting to become a video game developer.[3]

Kay Yu created his YouTube account on December 13, 2012.

Kay Yu created his Twitter account in December 2015.

Involvement in Hololive[edit]

See also: HoloCure

Kay Yu was the animator of Calliope Mori's and Gawr Gura's original song, Q.

HoloCure Development was started by Kay Yu around late February 2022.[4] HoloCure released to the public on June 24, 2022 after a period of closed beta, It included all members of Hololive English at the time.[b][5]

Kay Yu stated that he wants to keep HoloCure strictly a passion project.[6]

Kay Yu created another account in April 2023, Saying that it was due to him wanting his main account to act like a art portfolio.[7]

HoloCure 0.6 released on Steam and Itch.io on August 17th, 2023.

The official HoloCure Twitter account announced a new game on March 1st, 2024, Holo X Break.[c] Unlike HoloCure, Holo X Break is published under holo Indie.


Kay Yu has worked on many TV Series and video games, This is a list of everything he has worked on.[8]

TV Series[edit]

TV Series Role Number of episodes Year
Mushoku Tensei: Jobless Reincarnation Key animator 6 2021-2023
One Piece Key animator 1 2023
Sydsnap Ending animation 6 2021-2023
Ippon Again! Key animator 1 2023
Bleach: Thousand-Year Blood War Key animator 1 2022
Boruto: Naruto Next Generations Animation 9 2020-2021
Castlevania Animation 2 2021
Sword Art Online Key animator 1 2019

Video Games[edit]

Video Game Role Year
Advance Wars 1+2: Re-Boot Camp Key animator 2023
River City Girls 2 Animation Director, Key animator and sprite designs 2022
Shantae and the Seven Sirens Cinematic animator 2019
River City Girls Key animator and sprite designs 2019


  • Yu is Kay Yu's real family name and Kay is the first letter of his real Chinese name.[9]
  • Kay Yu speaks Taishanese.[10]


  1. Mainly used for posting art and described by Kay as a 'art portfolio'
  2. Hololive English -Advent- debuted after the first public demo was released
  3. The X in 'Holo X Break' is silent