BTS, also known as Bangtan Sonyeondan, is a seven-member South Korean boy band that debuted in 2013. The members are RM, Jin, Suga, J-Hope, Jimin, V and Jungkook. Known for their music, which spans a range of genres including hip-hop, pop and R&B, BTS has been praised for their meaningful lyrics and socially conscious messages. They have gained a huge global following and their achievements include multiple number one albums, sold-out world tours and collaborations with prominent artists. BTS has also been recognized for their philanthropic efforts and mental health advocacy.
BT21 is a group of characters created by BTS in collaboration with LINE Friends. The characters are Tata (V), Chimmy (Jimin), RJ (Jin), Koya (RM), Cooky (Jungkook), Shooky (Suga), and Mang (J-Hope). Each character reflects the personality and style of its respective BTS member. The members designed the characters and their backstories, which were then brought to life in LINE Friends merchandise, animations, and other collaborations. The BT21 characters have become popular among fans and are now seen as an extension of the BTS brand.