[There's just a "glare" at the whole favor thing before he internally nods at Naomai's response. He had expected it, and it's a good one. So he first acts surprised by her answer before putting on a thoughtful look, as if ruminating over her words while he's really just deciding what to do next.

He has two paths. He could either take the "sentimental" route and see where it goes, or possibly cut things early and take the "prideful rejection" route to end the discussion.

...Well when he thinks of it that way, there's clearly only one answer.

So he finally softens his expression a bit, as if recalling the past. Pretending to be bittersweet, there's a small quirk of his lips.]

Yeah, it did. With all the fighting we had to do, with my swords and your magic... At the time it was necessary, and we were quite the formidable pair.

[He's just going to cast Naomai an amused glance because he is just piling on dramatic tragic backstory.]