All right, I've updated my sheet with Kazuki's personal thoughts on others. You are free to make up a relationship based on what Kazuki thinks of your characters, OR do the same as me for now.
I wouldn't bank on Sloth too hard yet, but I think he'll be along with a CS soon (or he should anyway).
All right then, I hope he is. With him, we'll have a guitarist and a four person group.