Yamao Yamada, manager of the dance school Pretty Top, exhibits eccentric mannerisms mirroring Penguin-sensei, the mascot companion perched frequently on his shoulder. Known for declaring "Yamada-desu" as his signature greeting, he sporadically interjects with additional phrases. His appearance—brownish skin, muscular frame, and mid-40s age—complements his whimsical persona. In *Rainbow Live*, operating under the alias Tanaka at Edel Rose, he aids an inquiry into confectionery thefts, temporarily parted from Penguin-sensei. Their reunion in the finale precedes the mascot’s banishment to Mascot Hell, erasing all memory of their bond from Yamada’s mind.

Later, as Prism Association Chairman in *King of Prism*, he sports white hair, immortalized alongside Penguin-sensei in an Edel Rose bathhouse statue. A youthful dream of voice acting, hinted in *Dear My Future*, adds depth to his backstory. Central to his narrative is his bond with Penguin-sensei: their quirky synergy and abrupt separation amplify his role as both a comedic foil and cryptic presence across interconnected storylines.