Asriel Dreemurr

There is something you can do for me, darling.

[Mettaton's lips twitch upward, but his smile looks hollow.]

It is selfish, but I'll ask it of you anyway. Please keep me company until...well, until I have to leave. After all, that is all it is. Leaving for a little while, right?

[Leaving his friend. Leaving his family to mourn. He doesn't want to. He wishes he could take this all back, but that's impossible. A monster cannot be saved from falling down. Alphys had tried, and she had failed. He's not stupid enough to think anyone would care enough to try it with him, nor would he want them to.]

I won't ever really leave you, Asriel. I've grown so fond of our friendship, and if you can promise that you will never leave, then I, too, can promise it. It won't be forever.

Don't be sad, please? Let us do better than that.