So far I can think of three; I ended up liking Friedrich and Seraphina a lot more than I thought. I made them just to be Archer's parents and just wanted to put a face and name to their concepts, but then I decided to think about their relationship a little more and now they're more developed and they are a super cute couple and some great parents and I enjoy day dreaming about them XD
I also ended up Leroy more than I thought too, I made him out of coming up with an idea for Lloyd, and somehow I came up with an idea that two of them were made but then got split up abruptly, so they developed in different environments. I think at one point I liked thinking through things how Leroy would see them, even if my thinking would still be simplistc compares to what his actual would be like.