Babel II - Season 1 Episode 29 The Guitar that Calls Death
Overview: Joe, a boy under Yomi who controls the giant robot Titan with a guitar. He pretends to want to work at the ranch and pretends to be a normal boy and comes to Yuki's ranch. The purpose, of course, is to eliminate Babil II, who was beginning to get used to life on the ranch. What will you do, Babil II?