here are a few Kachinas and their purposes.
Koshare or Hano Clown
Because they do not wear masks, the Koshare or Hano Clown are technically not katsinas. However, they play an important role among and integrate with the serious katsina. Like most katsinas they teach lessons and give social commentary with their actions.
The Koshare figures are both sacred and profane. When there are pauses in the kachina dances, they amuse the audience with their inappropriate actions, loud conversations and gluttony. Koshare are also called Gluttons, which is why Koshare dolls are often shown gorging themselves on watermelon. They overdo everything to show you how stupid inappropriate behavior can be.