If it wasn't important when Frisk was trying to say it, then why would it be important now?

[He owes Frisk something. He likes Frisk, while Chara's just... Chara's not really anything at all. Chara's not the one who cries out for help and gets heard. Chara's just another kid for grown-ups to tune out.

So what's the point, right? They pick up their bouquet again, put a smile on.]

I won't bother you with it. I'll just whisper it to Narcissus, instead.