Harold Halibut

In Chapter 2.1, you'll gain access to the Utility District. Head here to find the mailman, Buddy. Speak with him and he will invite you into the post office to read unopened letters.

Throughout all of Chapter 2 keep checking in with Buddy every time you visit the Utility District to read all the letters. Sometimes he may even offer a second letter to read during a visit, always choose the option to continue reading when presented to make this process quicker.

In Chapter 4.2, you will now have the ability to begin delivering letters that Buddy was never able to. The letterbox will be in your room and you can only grab and deliver one letter at a time, so you'll need to continue returning to your room after each delivery. Here are all the deliveries:

• Professor Mareaux - Lab District (Lab)
• Captain Zoya - All Water District (Captain’s Deck)
• Brigitte - Flumylym Cave (The Crack)
• Rafi - Agora Arcades (Intercom Oasis)
• Chris - Social District (Classroom)
• Major - Flumylym Cave

You will receive one last optional task, read the final letter and return to Chris in the Social District. After some cutscenes the optional task chain will complete and this will pop!