A pug that Hibito keeps as a pet in Houston. His name comes from the Apollo mission to the moon. He has a heart shaped patch of fur on his left side, and likes to eat hot dogs. He can serve as an accurate and brutally effective alarm clock. Apo helped Mutta pass the second round of examinations by leading him toward the fire extinguisher wielding man in the restaurant they were visiting. Mutta was able to steal Apo's credit for apprehending the criminal, and received a multitude of praise around the world. This became a pivotal point in the judge's decisions for the second exam.