Danke Sand evolves into No Sandkyu when fused with Dune Sand.
Danke Sand resembles a giant sand dune with a cloud hanging behind his head and beady eyes with yellow sclera. Danke Sand also has tiny blush spots around the corners of his wide mouth.
He is extremely polite, never forgetting to say thanks under any circumstance. Unlike his evolution, he isn't very picky and will eat almost anything that crosses his path if he's hungry. In the manga, it's shown that sometimes his stomach can overtake his heart, and any person/yo-kai that he strikes up a conversation with can suddenly become his next meal at the drop of a hat. His trading quote suggests that he is aware of his tendencies, and will try to prevent himself from eating those he is close to (in this case, the player character).
Danke Sand has the ability to manipulate the ground around him (specifically sand) which he can use to make barriers to trap potential meals.
His inspirit makes people extremely grateful for everything, making them hard to get mad at.
In Vol. 11 of the Yo-kai Watch manga, Danke Sand accidentally traps Jibanyan in his mouth while he was taking a jog on the beach. Danke Sand soon tries to eat Jibanyan, but knowing Danke Sand was weak to water due to his encounter with Sandmeh allowed him to defeat Danke Sand by spitting out a large amount of seawater onto him. This causes Danke Sand to crumble, and Jibanyan ends up at the bottom of the remains with a mouth and stomach full of sand.