Noelle and Kris are really reminding me of The Snow Queen by Hans Christian Andersen
We have two inseparable childhood friends. A tragic event weakens their friendship and causes them to drift apart: In the Snow Queen, it's Kai being pierced by the magic mirror, in Deltarune, it's Dess' disappearance
When Kai's frozen heart turns him cold and cruel, the Snow Queen steals him from his hometown, symbolizing how his cynicism and rejection of joy has separated him from his loved ones. Being with the Snow Queen slowly kills him, but all he notices is her beauty.
The player "freezes" Noelle's heart in the Weird Route, but instead of being taken by the Snow Queen, she becomes the Snow Queen. Being the Snow Queen is destroying her, but all she notices is how strong it makes her, and she decides to leave Hometown behind
But Noelle being Kai doesn't mean that Kris is Gerda. Gerda saves Kai, and I don't think Kris will be quite as successful in saving their childhood friend from "The Snow Queen."
Actually, Kris is also kind of Kai? Like Kai, losing their childhood joy and innocence has brought them down a cold, self-destructive path (and if theories are correct, Kris is under the influence of their own "Snow Queen")
So who is Deltarune's Gerda? Who has pure and unwavering love and support for her best friends, will stop at nothing to save them, and whose love can heal their frozen hearts?
Well...
not saying that Deltarune was intentionally inspired by The Snow Queen, just a fun thought experiment!













