He sounds extremely bizarre. [which immediately sets off a whole bunch of red flags in his head because weird humans are even worse than regular ones!! sometimes...] Doesn't he spend a good deal of time with Yozora? Would you want to invite the possibility of her visiting?

[but he's quickly distracted by the mention of someone knightly since that sets off even more red flags. having competition from regular weirdos is bad enough but he never measures up well to suave people! and before he can even say anything about that, he's caught completely off guard by the comparison.]

A lot like a father? [it isn't angry so much as surprised. at least there's nothing accusatory in his tone...] You think so highly of him? What's he like? [he'll get back to captain knight and Shu the weirdo later this is important]