[Both of those are probably bad things considering how often Kashuu just throws himself headfirst into danger... Too many heart attacks for poor Ichigo.]

Oh, right— [RIGHT, right, the whole "gotta explain things from the ground up" caveat. He's happy Ichigo is back (more or less - the city isn't exactly safe now and never has been for spirits like them), but explaining things is always a headache.]

It's like... basically what we're made of here? It's hard to explain and I don't really get it since it's all about technology and stuff, but basically we've been recreated from code or something and that code can get messed up sometimes.