I feel bad for Fikiri too. He has a very legitimate grievance, though killing talented kids and raising an army of giant monster vampire skeletons is not the best way to deal with it. Ditto Laurie.

Sister playing matchmaker is way less creepy than mom playing matchmaker. His sister could have taken care of him when he was little. If so, I think he doesn't think of it because his memories are still partially scrambled. I too found that "Oh yeah I kind of knew you, we were... neighbors, that's it, neighbors!" suspicious.