“ I am most pleased to begin my performance! „
Mysterious Virtuoso (Korean: 미스터리 가면, miseutori gamyon, "Mystery Mask") is a Rare Costume for 
Mint Choco Cookie. It is his first Costume, released during the Wicked Breakout Party update. It can be obtained either by drawing it from the Costume Gacha or by purchasing it with Rainbow Cubes.
Story[]
Quotes[]
General[]
- I am most pleased to begin my performance!
- Name the piece!
- This night is beautiful like my music!
- I like this piece the most.
- You haven't heard anything like this!
- What piece shall I play?
Tired[]
- My music...
- The following quotes are reused from the Cookie's base quotes. Every other quote is reused.
General[]
- Give yourself away to this irresistible melody!
- The following quotes are no longer attainable.
1vs1 Race (Retired)[]
- Let me begin!
- You have never heard anything like this!
- This is my solo!
- Let me play it prestissimo!
Trivia[]
- Mysterious Virtuoso was released alongside
Black Swan, Almost Great Detective, God of Grape Juice, Tuxedo and Mummy as the first wave of 2017's Halloween Costumes. - Mysterious Virtuoso is taken directly from LINE Cookie Run's Halloween event outfit for Mint Choco Cookie.
- Mysterious Virtuoso is inspired by the titular character, Erik, otherwise known as The Phantom, from The Phantom of the Opera.
- Additionally, this Costume was coupled with Cocoa Cookie's Christine Daaé Halloween Costume from Kakao/LINE Cookie Run, though Cocoa Cookie's Costume has yet to be released in Cookie Run: OvenBreak.
- Additionally, this Costume was coupled with
- Mysterious Virtuoso is featured in the Into the Catch! Teenieping World story. It is the form Mint Choco Cookie takes on after his ingredients are mixed up by traveling through the black hole.
