Definitely a mistranslation, he only recognised tonari after getting her form.
But about regrets, tonari probably liked fushi didn't she?
Damn, she waited forty years and then suddenly died, before ever fulfilling anything. Well, I guess except just helping fushi (even her last words were trying to save him), but that's still...
Man, she really was a strong one
Fushi really didn't do anything wrong holing himself up considering this is the outcome, but he also missed the times he could spend with tonari.
This....
This hurts so good.
And I don't think rynn comitted suicide just from that.