Dany is an NPC in Genshin Impact that you might run into while you are exploring the map. She doesn't like caves, and sticks to the highground. She also runs Time Trials, and you can complete them to get a chest as a reward featuring all manner of loot, including resources and weapons. On the map below, you can find all the Dandy locations that we know of at the moment, and we will update it as more are discovered. When you speak with Dandy, she will give you the chance to run Time Trials. These are shot glider courses that, if you complete them within the time limit, will reward you with a chest. You'll need to glide through various sets of rings to reach an end point, and when you get there you will be isntantly teleported back to where you met Dandy. If you did it in time, a chest will spawn beside her and you can loot it to get your rewards. You can run each time trial multiple times to get rewards, but you will need to beat your own previous time to do so. To make them easier to farm, it is a good idea to try and get as close to the time limit as you can each time you run them, as this will leave the most possible time for a followup run.