It's different, reading Chara face-to-face like this. The little hints of emotion and thought that would normally be plain to see have to be deciphered, guessed at.

But fortunately they both know eachother down to their very SOULS by now. And Chara...they get it. Just like Frisk knows what Chara feels about it, they know how Frisk's mind works.

"...I know. 'M not mad, I just can't." Frisk smiles kindly, squeezing Chara's hand. "You know I trust you."

After a pause, Frisk realizes they forgot something. "Oh! Um, Papyrus an' Mettaton are here, too! But they got turned human...it's so weird!"