Airship Ticket Quest
1. Talk to Kain Himere (airplane 50 61) on the Airship to Einbroch. (He's on the lower deck near the gambling tables). Talk to him 3x until he starts crying. Then choose "What's wrong?" and "I have time for a long story." He will tell you a story about his daughter that was lost, then give you a package to deliver to Defra at the Einbroch Hotel.
2. Go to the Einbroch Hotel (252 200) and talk to the front desk NPC. He will tell you that Defra is in Room #201. Go upstairs and into the upper left portal. There will be a little girl named Elle next to the correct portal. When you walk near her she will sing a song. Talk to her and choose "what are you singing?". She'll tell you to visit her mother Tarsha Cherno in a house behind the hotel.
3. Go into the portal into Defra's room. That is his room, but he's not there. You will get a dialog about how he's not there, but maybe you could try and help the little girl (you're talking to yourself).
4. Walk outside behind to hotel to the northeast (einbroch 276 233) and enter the house there. Talk to Tarsha Cherno and her husband. They will tell you to look around the house. Look beside Tarsha for "Unidentified Machine" and "Mirror". When you look at the Mirror, you will see reflected a scar on Tarsha. Talk to her and ask her about the scar and follow the story about her father being lost.
5. Go back to the airship and talk to Kain. He will take back the package since it was undeliverable, then choose "mention Miner's Song." He will go through a story and ask you to find a Journal to prove that he's Tarsha's father.
6. Go to Einbech town near the south portal. To the west of the portal is a small area with 2 old ladies standing there (einbech 47 107) . Click on trees around there that have a "..." and eventually you will dig up the journal. Read it through, then return to Tarsha.
7. Return to Tarsha, and choose "check her hands". Tarsha will be happy to hear her father is alright, and offer you Free Item Repair service. Then she will send you back to talk to Elle (the child in the hotel), and Elle will give you a Doodled Note to give to Kain.
8. Return to Kain in the airship and he will give you 4.