Rupin

Rupin is a character from The Legend of Zelda: Skyward Sword. He is a crafty, smooth-talking merchant who operates an item shop at the Bazaar. He lives with his mother in the western part of Skyloft. At night-time, he will buy certain treasures from Link. If Link leaves his stall without making a purchase, he is visibly disappointed at not having sold anything.

Etymology
The name Rupin is likely derived from Rupees themselves.