Yamao Yamada is the "manager" of the dance school Pretty Top and is strange just like Penguin-sensei. He carries Penguin-sensei on his shoulder, and the only thing he says is "Yamada-desu". In rare cases, Yamada does say other things. Yamada has brownish skin and big muscles. His age is around 45-46 years old.
According to the Pretty Rhythm All Star Fanbook, Yamada had been aiming to be a voice actor in his youth.