A lot of deltarune fans expect us to enter the shelter just to see gaster at a desk with the knight in a lab tank unconscious and gaster going “hmm yes. very, very interesting. you wings finally found my ding” and it shows
When Gaster’s second to last text box before his boss fight after explaining all the lore of Deltarune is “tl;dr” and I know EXACTLY what’s coming next
Susie: "Wait, so...if the knight didn't make the shelter fountain...who did?"
Ralsei: "...him."
"Doctor...WD...Gaste-"
"Once upon a time, a LEGEND was whispered among shadows."