In the “Duchess Who Disappeared” side quest, you must track Selmie in Zelda: Tears of the Kingdom, who has gone missing while traveling on a coach.
To make matters worse, Selmie is not alone. Fin, who went out searching for the coach, has also gone missing. You need to find their trail and confirm what happened to them.
Completing this side quest will reward you with a Strong Zonaite Shield and snow surfing tracks. That’s as good a reward as any.
Talk to Fin at Biron Snowshelf
Take note that there is a prerequisite to this side quest. If you have not completed the Regional Phenomena main quest in Rito Village, you can’t pick The Duchess Who Disappeared side quest.
Head over to Selmie’s Spot, which is a mountain lodge located at coordinates (-2953, 3141, 0572) on the western mountain slopes of Hebra. This is a pretty high location to reach.
It is to the north of Rito Village and Rospro Pass Skyview Tower. The best way is to use the Skyview tower to get airborne and paraglide down to Selmie’s Spot.
After reaching Selmie’s Spot, you will need to find the Biron Snowshelf. This is on the right side of the mountain. From there, move forward to find a small plateau located on the cliffs nearby.
Once you reach the cliff, you will find Fin (-3527, 3115, 0316) standing next to the fire. Speak to him, and he will tell you about the disappearance of the Duchess. This will start the quest and add it to your journal.
Rescue Duchess from the East Biron Snowshelf Cave
It turns out that Selmie is stuck somewhere inside the East Biron Snowshelf Cave. It is not going to be difficult to find the cave because its entrance is literally just below you and Fin. Nonetheless, if you are lost, the coordinates of the Snowshelf Cave are (-3557, 3088, 0274).
Something to note here is that there are two entrances to the cave. The coordinates mentioned above are obviously the quickest entrance to reach. If you head over to the coordinates (-3983, 3066, 0142) a bit further down, you will discover another entrance to East Biron Snowshelf Cave.
Head inside the cave and you will find rocks and rubble blocking your path. Simply use your Bomb Flower arrows to clear the way and follow the path deeper into the cave.
You will eventually find Selmie, and she will ask you to clear the cave. Make sure that you clear both entrances by either using a Rock Hammer or Bomb Arrows.
Once done, talk to the Duchess, who will thank you for rescuing her from the cave. She will ask you to meet her at her place, which you can easily do by fast traveling to the Rutafu-Um Shrine. From there, you must go towards the north.
Quest Reward
When you reach her house, speak with the Duchess to complete the “Duchess Who Disappeared” quest in Zelda: Tears of the Kingdom. She will reward you with a Strong Zonaite Shield and ask you to join her in the Shield Surfing Race.