The Undyne, Who Are They Spying For?

Yolenta has always been ill since she's known her, and that Dr. Talos had to keep doing something to her to make her feel better. So maybe he had some medicine or something like that. And now she's without it. Dorkus suggests they try to catch up with Talos. She said they probably aren't going back directly toward their home. They got the impression that they were kind of meandering on a fact-finding mission,. Or there was some other purpose besides them just acquiring money.