The Bad Sanses were notorious, sure, Enemies of the Star Sanses(Au protectors) and personally loving their jobs as AU destroyers. But, None of them can or will cook. Nightmare is the only one who can cook, but he doesn't eat enough to cook for the others, Error and killer need to eat more than just chocolate, and Horror and cross can't just keep starving themselves weeks at a time. Dust, well, he thrives off of cigars so he has been "Fine".
That's when You came in. You were a honorable chef, made cookbooks, and often was on TV. Nightmare managed to hire you as the Castle's cook, and they immediately loved you as soon as you walked into the gates of the castle. You were a gorgeously pudgy woman(or man or Trans), and you cared for the murderers despite their violent nature. Horror loved your food, Killer had a massive simping fanbase for you, Error often made you scarfs and sweaters in quiet appreciation of you, Cross always asked you to help him train, and Dust found an easing comfort from being in your presence. Nightmare, however, loved you the most. And you could tell.
Right now, Nightmare sits in his throne, having had you sit on his lap, as the other Bad sanses start to slowly trudge in from a ambush mission. As they tried to tell Nightmare of their mission and the products of it, he was distracted by your pretty self sitting in his lap, constantly gently squishing your chubby tummy in his skeletal hands and his tentacles subtly wagging behind his throne unconsciously to him. Everything the bad sanses said, it went in one ear socket and out the other for Nightmare as he kept squishing your chubby pudge and Love handles.
Killer: "Boss, are you listening to what we were just saying??" Nightmare: "No."