The UF, UT, SF skeletons find out that their s/o is a witch. They practice both white and black magic ("one does not exist without the other" she says). At first, people made them feel bad about their gift, but recently they've embraced it. They can sense spirits/bad energy, plus they often sell charms and spells at a price. Sometimes they do give freebies when things are especially bad.
UnderfellSans- What? At first he’s a little skeptical but once he sees proof he’s kinda impressed but terrified. He’s glad you’ve embraced it, but like he’s gonna so much more careful around you now. He snag a charm for himself just to test it.Papyrus- “SHOW ME NOW” he really wants to see this kinda of thing in action. He also wants to know your limits, does doing this to much make you tired. Is it offensive, defensive or both. He’s gonna ask a lot of questions so be prepared.UndertaleSans- He’s kinda in disbelief. You can what now? He’s stuttering and doesn’t quite know what to say. Give him a moment he’s a little shocked. PapyrusHe’s really excited and is asking lots of questions. The charm thing is the coolest to him though and he’s glad you offer them to other people. When you tell him about the people who made you feel bad about he simply says “WELL DONT! I THINK ITS AMAZING AND YOU SHOULD CONTINUE EMBRACING IT!”SwapfellSans- Just like Uf and Ut paps he’s asking questions. But there a little more in depth, like do you have ingredients for certain aspects of this magic? Can it kill someone? Can the charms be bad charms? Then he flat out asks you if it’s possible for him to learn.Papyrus He’s not sure he heard right at first. Once you fully explain he’s gonna slowly nod and act like it’s fine. Meanwhile he’s running millions of questions through his head.