That father himself looks like a Yoma, for sure. I suppose it's not him, though, because people who look evil and ugly normally don't turn out to be the actual monsters in mystery cases, but he certainly looked suspicious.
One thing I'm also looking forward to it is whether Clare will become honest to herself or not. Now she keeps saying she doesn't care about others and how she's generally not a nice person, but time after time she goes out of her way to save others even if it means harm will befall her instead. It could be just a way for her to try to keep her distance to Raki, but I have a feeling that's not it entirely.
In any case, I do see greatness in this series already.