Kage is spectacular in my book. I'd definitely sign up for any of his courses.
There is more than a high chance of them hurting each other, but of course I'm not saying what, if anything, I have planned.
I especially love my secondary, best friend characters. It allows me to channel some of the relationship I have with my best friend. We don't get to see each other but every couple of years, we text more often than we talk, but I'm expecting a call from her next week. Last year she forgot to call me on my birthday and I still haven't let her live it down. If she forgets again this year it will call for drastic measures. I'll call her mom.