-1-
[During a desperate struggle of some kind, someone has been contemplating the concept that there is no way of winning, which is why he or she is lying stunned on the ground and Isshin is rubbing his knuckles on one hand. Maybe it's you.]
You keep talking with a lameass attitude like that and I will REALLY go to town on you, got it!? Eyes forwards! Positive thoughts! We're gonna get through this!
-2-
[What ACTUALLY happened is completely irrelevant compared to what Isshin THINKS happened, which is why he's giving you a Knowing Look as you come home from spending the night somewhere other than here.]
Heeeeey, look who finally got back after spending the night with a...[eyebrow waggle] certain someone. Good job man, I didn't think you had it in you!
-3-
[Isshin just got a memory back. And so he is standing on the roof of the apartment building late that evening, looking thoughtfully into the sky while smoking a cigarette. You've never seen him smoking before now.]