Payn evolves from Ake when fused with a Buff Weight.
Payn is a small Yo-kai, smaller than the average human child, with gray-colored skin and a large, green head with purple star-shaped marks on its closed eyes: the head is completely smooth save for a tuft of orange hair on top and a goatee. He wears a brown vest, red pants tied with a belt and carries two dumbells, and has a long pipe clenched in his teeth. An omamori hangs from his neck.
In the English dub of the anime, since tobacco references on American TV where children can see are considered inappropriate, the pipe in Ake's teeth was replaced with a leaf.
In the anime, he has big spirits, and never gives up to the task of causing pain to the shoulders of others even if the odds are against him.
Payn also appears in the Abandoned Tunnel in the area behind the C Rank Watch Lock (Mt. Wildwood).
Befriended (Yo-Kai Watch):"Ay, not too bad, eh! Let's be pals?"
Receiving food (favorite):"There we go!"
Receiving food (normal):"Well then..."
Receiving food (disliked):"*hock* Ptew!"
Freed from Crank-a-kai:"You must be strong to get me outta there. We're gonna be buddies!"
Payn, along with Ake, debuts in the anime in EP022, when they try to make Nate's shoulders stiff. Despite the harrownes of the task, Payn gives Ake an "Old master" speech, and inspires Ake to continue the attempt. Despite this, they do not succeed. The pair then gives Nate their Yo-kai Medals.
Payn shares its inspiration with Ake, with the addition of the facial hair, clothing and omamori worn around the neck (an old-fashioned custom, somewhat comparable to wearing a crucifix in several Christian countries) creating the impression of an exercising old man.
"Payn" is a corruption of pain.
"Katanori-oyakata" translates as "shoulder-riding mentor", while playing on katakori (肩凝り, "stiff shoulders").
"Agujeto" is a corruption of agujeta (shoe lace or pain).