Line Friends are featured characters, invented by South Korean designer Kang Byeong Mok, based on the stickers from diverse applications of the South Korean internet search giant Naver Corporation and the Japanese messaging app Line.
BT21 is the first presentation from FRIENDS CREATORS, a project formed to create new characters for the Line Friends series. South Korean boy group BTS was the first artist of this project and the main theme of the project is to show the connection between BTS and Line Friends in terms of popularity in the world.
Tata was created by V. His character is a curious, shape-shifting alien prince from the Planet BT with a heart-shaped head and a blue body with yellow polka-dots who spreads love across the universe.