Day 1. fish
I'm aware that when someone saves a magical being, and get's a true answer to any question in return, the question 'Has the fish died yet?' isn't a question people usually go for. I can confidently say it isn't even close to being in the top 100. Most people would go for something that would benefit them, or something that would make the world a better place. I could've asked for the winning lottery number, or how to actually end world hunger. But those things would inevitably lead to some sort of attention my way. And seeing that I had just spend hours and hours wandering through a forest on my own I think it wouldn't be too hard to imagine I'd rather live my life without any type of spotlight on me. So the option left was to ask something that would satisfy my own curiousity. Preferably a question that had an answer I couldn't easily look up or figure out on my own. To be fair, it was getting dark, and I didn't feel like being in that forest after the sun had fully set. Especially now that I had been made aware of the very existence of magical creatures there. So when the question popped up in my mind I did not spend much time trying to find a better one.
When I was 14 I had a biology teacher who told us about her pets when she introduced herself the first day of school. The most interesting ones were the fish. Two of them. She told us she didn't really like taking care of the fish, and she was waiting for them to die. She would never kill them though, she would just not get new ones after they lived a perfectly good life and had died a natural death. The main 'problem' was though, that one of the fish was quite stubborn. He had lived quite a long time already, outlived three companion fish so far, and refused to show signs of old age. Now and then during the school year we would ask about that fish. Everytime the answer was the same: the fish was perfectly fine and very much still alive. I switched schools somewhere during that year, and one of the few things I felt genuinely sad about was that I would never know the faith of that strong-willed fish. During my time in that class I had started to respect that little animal. I even asked my brother, who got her as his teacher his last year of high-school, to ask if the fish was still alive and swimming. It was, even when he graduated at the end of the year.
After that I had no way of asking about the state of my teacher's least favorite pet. For years now, at random moments, my head has gone back to thinking about the fish. Hoping that my teacher had still continued to buy companions, and wondering if fish could maybe outlive humans if they were stubborn enough. So naturally, when faced with this huge chance of a magical favor, one true answer, my mind went back to the fish.
I asked. And I'm fairly sure the magical being looked more suprised at the content of my question that it did at me being able to see it in the first place.