A large pig-rabbit Yo-kai with a big large obese Fat round belly and with a single horn, on head thick purple lips and drooping ears, and his green tongue is always hanging out. He wears a yellow swimming mask, a grey towel tied around his shoulder and two wrist bands, as well as white boxers and a blue loin cloth with a hot spring symbol on it. He carries a bath bucket in each hand.

In his friend form, however, he becomes significantly smaller, his horn becomes shorter and his bath buckets no longer protects his belly.

Sproink greatly enjoys hot baths, as most of his appearances in the games have him set in a hot bath of some sorts, be in that in Springdale, Gera Gera Resort, or even in the Hazels' Mansion. In his first appearance in the series, he becomes visibly annoyed when he is interrupted by the player, and engages him in combat. He also combats them in the second game. However it turns out he only did it because he was too dizzy to think straight.

When Sproink bathes in a hot bath, the water becomes incredibly hot, so hot that most people become dizzy.

Being a Yo-kai of the Hot clan He hangs out with Blazion, Swelterrier, and Swelton all the time. On occasion of the White and Red Song Battle he formed the "Atti Soul Brothers" musical unit with them in order to compete on behalf of the Red Team. As with his peers, he is easily terrified of Blizzaria.