J (EntityTopic, 7)
From Compile Worlds
J is a new character in Puyo Puyo Tetris, representing the Tetrimino Planet since Tetris itself has no proprietary characters of its own. She is one in a set of inseparable twins, with the other twin being L, similar to Yu and Rei in Puyo Puyo Fever 2, or Arle and Carbuncle in more recent games. J and L are described as being mischievous, and you don't know what they're up to at any given moment.
Etymology
J comes from the "J" shaped block in Tetris, with L being named after its mirror image to correlate with their twinship.