From the Super Mario Wiki
“A Windmillville original! This adorable doll shows a Koopa wearing her traditional garb!
Koopa Shepherdesses are the Koopa inhabitants of Windmillville in Mario Party 7. They run the Orb Huts and the Trampoline game as well as tend to the sheep at the Sheep Pen and maintain the five Windmills in the village. The player could buy a trophy of a Koopa Shepherdess for five hundred Cruise Mileage Points in the Duty-Free Shop.