[That's... unexpected. That's bad. It's enough to cause Kashuu's expression to briefly drop into a look of blank shock, because it's such convoluted logic that it's honestly terrifying. A plant would have been easy enough to deal with, or even a sword whose desire to change the past began to override their need to complete the set mission. This? He's not even sure where to start with this.

At the very least, it seems like Kashuu doesn't have any plans to take the destructive way out by shattering Midare's vessel, but he's certainly left with a dilemma here. He can't take him back to the base when he's like this. Even incapacitation will be temporary. Will they have to set up some sort of holding room? It seems convoluted - a mistake waiting to happen. He holds the tantou very carefully and eyes Midare with even more care, but keeps his distance for the time being. With some amount of harshness:]

D'you even hear what you're saying? That's— completely insane. That's not gonna help anyone! What you're trying to do here... All it is is pointless destruction.