Hey, there. I've got a small problem with one of my vault dwellers. I sent him out for exploration and he returned with ~50% happiness, radiation and health damage. I healed everything right away and had him guard the vault door afterwards. But even though I had healed him, his happiness dropped to 10%. I also sent him to other jobs, assuming he is not happy guarding a door, but no results. Also he does not respond to happiness boosts: successfull rushs have no effect. Having fun with the ladies in the bunk also shows no result for him. But everyone else around him is absolutely fine with 100% happiness. I honestly start to think about sending him into the wastelands on a trip without return just to get rid of his sad face!

I only have one assumption: could it be that he is unhappy that I sent his daughter out on an exploration journey?

If you love something let it go. Out into the wastes without supplies.