After doing Asriel, I thought I'd also throw in Undyne as well. Plus, I think the jungle environment is one good place for her to live in cause she'll have herself face lots of dangerous predators.

Wonder how Alphys will react if she were to see her like this.

Art by keendeemiyavi from Deviantart.


P.S. In Deltarune (a game also made by Toby Fox which also involves the same characters), an NPC asks the protagonist if it hurts to be made of blood. That basically tells us this: Monsters don't have blood, and that would also mean there's no meat in monsterkind, only magic which isn't exactly edible.
That would technically mean Undyne won't be seen as food to any of the predators.