BT21 

I guess it's an online band created by BTS, Big Hit Entertainment, and LINE FRIENDS. Each BTS member has one character that represents themselves. BT21 was also made as a puzzle game called Puzzle Star BT21.

BT21 was created by BTS.

BT21 by taehyung's romantic wife November 2, 2018

BT21 

BT21 are a Line production made by BTS. The line BT21 consists of Jin's character: RJ. Suga's character: Shooky. J-Hope's character: Mang. RM's character: Koya. Jimin's character: Chimmy. V's character: Tata. Jungkook's character: Cooky. And a bonus character, Van. All characters are designed based on each BTS members' drawings which you can see them creating in a YouTube series about it where you can see the process of drawing them. BT21 has its own Twitter and Instagram account. BT21 is used in a lot of designs for Line, like plushies, dolls, headbands and more.

BTS fan: I got a new BT21 plushie!
Someone: What is BT21?
BTS fan: BT21 is adorable characters for Line designed by BTS!

BT21 by ARMY0505 September 28, 2019

@_______bt21_______ 

💖An account on TikTok that makes amazing BTS edits and tutorials💖

Ayo you should go follow @_______bt21_______ on TikTok! (7 underscores on each side btw)

@_______bt21_______ by _______bt21_______ April 29, 2021