[The joke earns a small chuckle, and it's the closest thing to a laugh that Asriel's had in a long time.]

No, it's not a growth spurt...

[He smiles a little.]

I could probably ask Clu. He's really smart, he fixed my chest when it was turning to glass way back in July.

[He rubs at his eyes, but when Mettaton continues it's hard for them not to start watering a little again.]

Mm... I... I wouldn't leave you either. [Despite his plan earlier that he was going to replace himself. Mettaton, Chara, and Frisk... they couldn't possibly want this broken, ugly version of him. Do they?]

I really want you to stay.