I've been thinking about Asta and Yuno's parents, and I think I have a theory as to who Yuno's father may be. I know this theory has flaws, but I really think I'm onto something here. Without further ado, I think Yuno's dad is Fanzell, ex-military commander of the diamond kingdom. Firstly, Fanzell uses wind powers (same as Yuno). Magic in BC is shown to be hereditary. Noel and Finral's families are examples of this. Given that Fanzell is the only other wind magic user in the series to date, this is either a coincidence or a hint. Secondly, I find their appearances strikingly similar. Look up an image of Yuno's face and then compare it with Fanzell. Their hair is practically identical (save for color), and their face has the same diamond-ish structure. Now how does this fit into the black clover universe, you may ask? Fanzell may have had a child with dominante or someone else before he met her. Fanzell's dangerous position could have caused him move the child somewhere less dangerous, like a certain church on the edge of the clover kingdom. Hage village is very close to the diamond kingdom's borders, and seems like a likely choice. Perhaps he didn't want his child to go through the same thing Mars did. As for why Yuno was with Asta, I have no idea -_-
Well, that's it. I've got a good feeling about this theory, but I could also be completely wrong. Please tell me what you think!