after escaping from Alphys in waterfall, you arrive in Hotland, see two Guards (Catty and Bratty), you pass and go to the Royal laboratory, you meet Undyne and Napstaton, it was a killer quiz... You go through the laboratory and meet only Catty and she turns to you saying "hey, it's not safe to walk around this area, There is a human in the region and Bratty and I have come to capture him/her. She's on the other side and I'm here checking, so err..." She analyzes you better