William Freeze is in the multiverse & he is visted by 4 other Sans: Fresh, Ink, Error & Blueberry.
William: Hi. I'm William Freeze, William Freeze the Leafeon. My job is to relax. So, three of you are from AUs & that guy (referring to Error!Sans) is from a so-called AT. So, Swap, Ink, Fresh & Error, do I have that right? Are those your respective worlds?