Okay I just finished Deltarune chapter 4 and I have THEORIES in my BONES that I have to RELEASE. But none of my friends have finished so I will shout them to the internet and we shall see how wrong I am in 2026
----spoilers----
1) the roaring night is Dess. - This is a popular theory but, I have addendums as to WHY. I think that Dess disappearance either has to do with falling into a dark world and not being able to get out, or being on the brink of death (maybe from similar ailments as her father) and Carol and other adults using the dark world as a sort of Stasis solution. Carol potentially using her own daughter to further plans and using Kris with the coersion of "don't you want to bring asriels friend back?" Which leads into 2
2) Asgore is involved in the Dess situation and that's a more major reason why him and Toriel are divorced. I think in secret, the Dreemur and the Holiday parents somehow did this together, but Asgore was the one to pull the trigger in a way and that's part of why Toriel doesn't deal with him. She knows he's involved in the child disappearing or dying and doesn't forgive him just like in Undertale. I think this is the meta reason why she can't be awake in the dark world. She would recognize it for what it is. She might even recognize the knight as Dess and spill the beans. Also I think Asgore is STILL in on it and talking to Carol in secret making plans.(I believe Carol is on the phone both times)
3) "The Girl" in the prophecy is Noelle. Lots of little shit to back this up. She has already had her love scene in chapter 2, She can equip both swords and ribbons. (Swords, because the prophecy shows the girl holding one. Ribbons because Ralsei mentions that Susie was suppose to be able to equip them) I don't think even Ralsei knows that Susie is not the monster in the prophecy. I think when Susie showed up next to you, they just ASSUMED. Piggybacking off of prophecy misinterpreting...
4) actually none of the fun gang are the prophecy heros. None of them look like the prophecy pictures or descriptions. I think the human in this case is the player (in the cage of Kris as a vessel) and the prince shrouded in darkness is Gaster.(him falling into darkness, being alone) I think this is a reverse perspective where the success of the prophecy is the downfall of the protagonists. The player, Noelle and Gaster shall bring about the light. Which brings up 2 more theories.
5) Snowgrave/Weird route is about the player somehow knowing the prophecy and obsessively forcibly willing it to happen. If Noelle is the monster of the prophecy who will fall in love, why not fall in love with us, the player? Why not try to interject her into the story you KNOW she's suppose to be in. Force her to act and get stronger for her destined battle. I feel like the end of the game is going to reveal the same impulse that Undertale Genocide route is suppose to bring for the player. "It's an RPG, I'm just playing the game as intended. You're SUPPOSED to level up, you're SUPPOSED to follow the narrative told to you and the prophecies made about you"
6) Susie's role in the prophecy is actually the antagonist. If we're claiming that this is a sort of reversed story and we're following who the prophecy is against, that would make sense that she's our main hero. But there's also a giant STACK of allusions to her being a Dragon, and a massive confirmation of it by Gerson basically saying that "whatever role you might fill in the prophecy, you'll be tremendous" and "you remind me of the dragon". Dragons in RPGs tend to be a final boss or at least a difficult thing you must slay. I think the thing that upset both Ralsei and Susie so much about the last prophecy was it having something to do with the heros banding together to slay the dragon, and the dragon in the picture looks EXACTLY like Susie. This would play into all of chapter 4, Susie actually feeling good and like she belongs and has just been misjudged, having a whole speech about how her being a prophecised hero is proof. Susie as a dragon is SO used to being told that she looks like a villain so she must be one and for once she feels like she can fight that and have friends and be the hero. And then the prophecy says something like "your not the hero. You will die and your 'friends' will be better for it." I think this is also why Ralsei seemed kinda evil to begin with but we only see them break down now. If Ralsei trusted the prophecy, it didn't matter where Susie was represented in it. Especially why early on Ralsei is trying so hard to emphasize mercy and sparing because he doesn't want anyone slaying anything and fight the prophecy that way. But then Susie MIGHT be the hero. It MIGHT be fine. Or Susie might be BOTH. Now Susie is his friend. Slowly as theyre all getting closer to their fate, they don't want to believe that betraying Susie is a good idea that they MUST do. (Like I said before, I think they're misinterpreting whose suppose to be the prophecised heros, but this misconception is what causes the rift.) I think it's also why Suzie doesn't want to sleep over at the end of the chapter. The prophecy of the hero(who they think is Kris) betraying her and slaying her, while she doesn't want it to be true is probably weighing on her that she wasn't meant to have Kris as a friend.
7) it's a common theory but: the prophecy is not identical to the opening animatic. There is the story of "Deltarune" the game, and the prophecy of "Deltarune", the in universe religion. And they sound similar but they are opposite sides of the same coin.
8) kinda a Undertale/Deltarune theory but the Sans in Undertale is actually originally the one from Deltarune who got shoved into another dimension based on whatever happens at the end of Deltarune. Because the monsters in deltarune bleed. Sans has also seen the sun before....in HIS dimension.
9)Undertale's underground is actually an extremely large dark fountain that all It's monster residents are sealed in. There's tons of references to not seeing the light (sun) and being trapped in the dark(underground). The humans FALL into the underground like people falling into a dark world. The barrier might be the fountain itself. In which human souls can cross freely, but monster souls need a human with them(like how Susie always goes to the dark world with us). It's possible that the barrier in Undertale gives us a hint to the ending of Deltarune. The "barrier" needs to be removed with 7 human souls. Kris soul seals our dark fountains, but maybe a fountain this big requires more help. Or this is a world where the roaring has already happened and the roaring plunged the world into dark...say like Gaster doing experiments with darkness and "falling into his creation".
I'm not a theory person. I didn't give a shit in previous chapters when people were like "is Ralsei evil and asriel¿???" "Is Kris the knight????" But now look at me. Chapter 4 broke me
Holy SHIT that was a lot. I want someone to talk to. Brain go brrr. I'll add if I think of more but ain't no one gonna read this fjfjffn


















