Question: who is v in bt21?
Answer: An extensive backstory featuring the seven cute personas -- Tata (V), RJ (Jin), Chimmy (Jimin), Cooky (Jungkook), Mang (J-Hope), Shooky (Suga), Koya (Rap Monster) -- and their space robot Van explains that the characters seek to become the “Universtar” in the 21st century.