Rescue Nate is a challenging quest in Fisch that involves collecting clues in Nate's Cave and piecing them together with help from his beloved kitty cat, Miso, to find the NPC. The first few clues are easy to put together, but the rest can be confusing. So, if you're confused about how to rescue the poor guy, here is a detailed guide.
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How to start the Rescue Nate Quest in Fisch
To start the Rescue Nate Quest, go directly to Sunstone Island and enter Nate's Cave at GPS (-914.0, 207.4, -1027.8). This is just behind the Merlin Witch NPC on a small cliff.

After entering the cave, you can meet the Miso cat at the desk, who will explain the situation in cat language and take you to a computer where you must enter the PIN. To do this, you locate four signs around the room in the correct order. This icon varies for each player, and you need to find your combination code.
Pin 1

For the first PIN, look on top of the stool next to the bedroom, to the left of the computer. Note the down icon, which was music for me.
Pin 2

For the next one, go down and check the bookshelf behind the sofa. Here, you will find an icon with the number 2 on it.
Pin 3

The third pin icon is in the car's front seat. You can find the car right at the entrance to Nate's Cave.
Pin 4
The final and fourth icon is on the computer table itself. Check the left side of the table for the fourth pin icon.
For more on Fisch, check out All 10 Fish in Coral Bastion (100% Bestiary) – Fisch or ll 12 Fish in Tidefall (100% Bestiary) – Fisch