[Okay Undyne, honey, you need to bring it down like eleven notches.]

[Or not. It's her life and like heck is Sans going to tell her what to do with it. He doesn't even bat an eyesocket at her excitement, even if he's going to be the one to poke a little hole in it with some bad(?) news.]

Not anymore there aren't. But hey, if they show up again, you can show 'em who's boss.

[Not gonna lie, they could've used her back then. Way to come to the party late, fish-lady.]

And if you think about it, it's not like they took on Asgore head-on. It's more like the entire planet got taken out at once. They didn't bother being fair about it.

Probably 'cuz they were scared of him.

[Clearly, that's the reason!!!]