Also, I might be retarded, but there's a conditional in Rodya's passive that says "if you get 3 tear-sharpened, you are basically forced into positive 30 SP, enjoy".

But how the fuck do you even get 3 "tear-sharpened"?
Is it JUST via guard skills or is there another way that I've missed?

I still maintain that Rodya will be charge.
It was revealed to me in a dream, god damn it!

It will be "special charge", same as Ryoshu.