Red Circle is a male contestant in Shape Battle. He's the main contestant in Shape Battle. Red Circle is also a nice character and sometimes mean because he extremely kills Golden Coin. But do not worry he is still nice seen in episode 1 and also he was so far the lowest ranking rainbow color due to being eliminated 3rd and Orange Rectangle rejoined. He is really hated because he got meaner every episode. He used to be friends with Grey Hexagon until episode 2. He was formerly the leader of Brown Rectangle's team until he kicked him on to the other side of the gorge in episode 3b.