Hi, lately I've been dating this sheep-goat mix of entity, he is huge and very tall and absolute gorgeous and cutie pie. He wanted me to meet his parents, but I'm not sure if I'll make a good impression. What should I do and know? Ps. He says Hi!!!
The most important thing is to stay true to yourself. If his parents are strict, then I understand wanting to put up a little façade for your datefriend's sake, to which I can mostly say to be polite and maybe bring a gift for them. The gift could be anything ranging from ancient coins to blood wine to blocks of salt (according to my sources, entities like that crave that mineral), and of course a more expensive gift will be more impressive!
Assuming that you are human; if his parents haven't met many of your kind before, you may also feel the pressure to be a good representative of your species. Just remember that it is not your duty to educate them, but they might be inquisitve. Your datefriend should be able to support you through anything if it gets too much for you.
Oh, and one more thing: buy a digestion-aid potion and consume it at least thirty minutes before you eat anything. Just in case! Sometimes underworld food can be difficult for humans to digest. These potions are easy to acquire from your local witch.