That's OK, I'm just considering how Kiyoshi should respond.
As for the life thing, I'm not sure how long Kiyoshi has left, but I would imagine it is going to be at least 50 years. The rest I can't say for sure, but I don't think Lantz intends killing any of them off young, and none of them are past their 20s yet, so I would imagine they have 50-odd years left too.
t isn't of old age - other causes. Hell, he can probably see just how drained 'Sakura' is due to this. She came damn close to killing herself with that van stunt apparently. And IIRC Taiga has 'Generic Anime Moe Wasting Disease #29047893'.
Oh, I see.
Well, I don't think Taiga actually has an illness in that sense, so she should live a normal length life, and Sakura is drained but that doesn't mean she's going to die.