Well, we know most shinigami with massive spirit force can mask it, but I'm curious as to WHY he'd mask it from his kid. I wonder how much he knows about what's happened to Ichigo thus far, too. I mean shit, I'd want to know if my son was out there beating CAPTAINS. So... Ishida already knew his dad was a Quincy? Man I'm dying to see what these two dads are capable of.