The first Hilichurl you come across on the 4th day of the Mimi Tomo event at Genshin Impact is Restless Hilichurl. It has a Mutual Exchange task for you, which means that it is looking for a specific item, and if you can give it to it, it will give you some information you need.
The good news for players is that they have a Handy Handbook of Hilichurlian that they can use to find the various phrases that the Hilichurli will use. Hilichurl will use the phrase “Gusha Celi Boya” and we will have to figure out what he wants.
Gusha means fruit from vegetables, Celi means heat or light, and Boya means red. So Hilichurl seems to be looking for red fruits or vegetables. We gave him a tomato and he was absolutely happy. If you want to do the same, you can find tomatoes in regular stores in Liyue or Mondstadt. You can also try any other red fruits or vegetables to see if it works. Give him the appropriate item and he will be happy as a clam and will provide you with the additional information you need, which is actually the location of the next 4th day of Hilichurl.
Players can open the Handy Handbook of Hilichurlian at any time by going to the Mimi Tomo section of the event menu and clicking on the Handbook prompt button at the bottom of the event description. There are quite a few Hilichurlian phrases, but fortunately it’s pretty easy to figure out what these little boys are talking about.