Luck Sprite

Luck Sprites are a mysterious race of small, green-colored sapients that inhabit the forest moon of Endor. They have the ability to affect other creatures' luck.

Behind the scenes
The design of the Luck Sprites, and their luck-related powers, were almost certainly inspired by the folkloric creatures known as Leprechauns. Coincidence or not, their species also bears a passing resemblance to a much more well known Star Wars race, known simply as Yoda's species.