Sister Princess Episode 21 English Dubbed Episode Title:Me Two to Bro.Episode Description:Rin Rin introduces her latest invention to Bro Wataru—a robot version of herself. She based it on all the sisters so that it would cook and clean and be graceful and strong so it could help Wataru with whatever he needs. RinRin reveals that she wants to study robotics in America, and that when she leaves, she wants there to be someone who can help Wataru out.