I have 3 questions.
1. Humans and Youkai don't need to be antagonistic 24/7, but the latter just need to cause incident/trouble once in a while to reinstate fear into humans to ensure their survival, correct?
2. I believe not all Youkai follows this rule, yes? Ex. Wakasagihime, Tewi, and Nemuno, from what I've read, aren't the type to go out and cause problems, so how can they survive? Gensokyo Chronicle?
3. I don't think it is stated anywhere how one can born a half-youkai hybrid, yes? I will assume that they are born normally like humans. Take Rinnosuke for example. That means one of his parents was a Youkai or a hybrid, so I assume that having a relationship with a Youkai isn't illegal?
Or a half-youkai hybrid is born because of something else?