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DELTARUNE THEORY
We're about to find out what Toby meant by this
Catti Cattenheimer remains one of the Deltarune characters with the most untapped potential to me. I don't expect her to see any meaningful increase in relevance at this point, but like, she and Kris had a falling out over her getting scared and abandoning them in the middle of their demon-summoning ritual! She "cast apology spells" about it, but that's not necessarily the same as actually apologizing to Kris themself!
She likes Noelle significantly more than Noelle seems to like her, having a crush on her and wanting to be pet by her while the only actual opinion about Catti Noelle expresses to my recollection is finding it kind of annoying when she analyzes horror movies while watching them. I don't think Noelle dislikes Catti by any stretch; their platonic friendship is definitely mutual, at least. That's more so just an illustration of how their levels of affection for each other are asymmetrical.
Catti resents Susie for, from her perspective, stealing Noelle away from her, and she doesn't seem to like Kris hanging around with Susie much, either. From her perspective, Susie is kinda stealing two of her three known friends, including the object of her romantic affections. Of course, if the two came to an understanding with each other, I'm sure Susie, at least, would be open to being friends with Catti, since she has a big heart and has come around on people she wasn't initially fond of multiple times before, but Catti doesn't know that.
I dunno I just think there's a ton of stuff to work with there! Like, Catti realizing how much it hurt Kris that she abandoned them and wanting to get more courageous to stand by her friends when it counts could be a good element of motivation for her to get more involved in the story, for instance! Her reaching an understanding with Susie and hashing out her asymmetrical relationship with Noelle would be the obvious relationship dynamics/arcs she'd have with those characters. I also think she offers a unique perspective on the Prophecy and other elements of the Deltarune religion by being someone who is spiritual but who is specifically not a follower of Hometown's church religion. It'd be cool to get her take on those sorts of things.
To be clear this is not "why I think Catti is going to get plot relevance" it's "why I think it would be cool if Catti did get plot relevance". Very much not the same thing! And at this point in the story these ideas are pretty much entirely fanfic fuel.
NOTE: I included the SOUL virtues because they kinda relate to the SOUL and I figured people might want them mapped out, as well. They are entirely secondary to Literally Everything Else Here. I initially made this diagram just for myself before deciding to share it and didn't remove them when I did. While I do think "Determination" is likely to be the Red SOUL's virtue, it's not technically confirmed and thus isn't included here.
So, a while ago, I decided to map out the "personal colors" of playable characters in Deltarune for non-theory-related reasons, and I realized that all of them are either primary or secondary colors on the CMYK color wheel. Specifically, I compared the colors used for their battle UI borders, which are all 255 in either one or two out of Red/Green/Blue and 0 in the other(s), putting them at the absolute polar ends of each color. I also included the SOUL, since it's the only thing you actually play as if you wanna get super technical about it and I thought it was significant that it was opposite Kris. It also has a color of #FF0000.
My observations about this:
The primary colors—cyan, magenta, and yellow—go to the three main Lightner characters; Kris, Susie, and Noelle, respectively.
The secondary colors—red, green, and blue—go to the SOUL, Ralsei, and... no one yet, respectively. That right there is part of why I consider this to have elements of a theory rather than just an observation.
As mentioned above, Kris and the SOUL are a complementary/opposite pair, which makes sense given how both intertwined and at odds they are with one another.
The other complete complementary/opposite pair is Susie and Ralsei, which is also sensible seeing as they're obvious narrative foils to each other.
The last hypothetical complementary/opposite pair, the yellow/blue one that would include Noelle, currently has no counterpart for her. She and Susie form a complementary color pair (yellow/purple) on an RBY color wheel, but not the CMYK one here.
They're not denoted here, but I kind of consider the Knight, Titans, Goners, etc. to occupy the center of the wheel, where black, white, and gray tones go.
I suppose the main "theory" aspect of this is that I think it's probable that there will be a sixth player-controllable character or entity associated with the color blue in later chapters, though I'm not totally sure who this will be. The "common thread" between Ralsei (green) and the SOUL (red) is that they're both more closely tied to the game/fiction layer of things than the three Lightners are, so I suspect a hypothetical blue character would be, as well. My best guess at this point, because of both that and parallels between Deltarune and Twin Peaks I've seen discussed that equate his Deltarune incarnation to Twin Peaks' protagonist Dale Cooper, is genuinely Sans, but that is, I really must stress, just a guess.
I kinda doubt it'd be Dess or Asriel, since neither have so far been associated with blue in any meaningful capacity. Dess's only notable color associations, as far as I know, are actually with red (the color of her guitar) and black if you subscribe to the theory that she's the Knight, while I'm pretty sure Asriel has only ever been associated with yellow and green.
Thinking more about the complementary pairs and what, specifically, those duos are used in conjunction with each other to explore or represent, both cases seem to represent a sort of... "freedom vs. the fetters of being a video game character" conflict.
Kris vs. the SOUL is pretty obviously representative of character agency vs. player agency; what Kris wants to do vs. what we want to do through them.
Susie vs. Ralsei form a sort of "free will vs. predestination" kind of contrast, in their specific case with a flavoring of "breaking the rules and writing one's own story" vs. "adhering to the course of a story already written".
In both of these cases, the "RGB" character/entity represents the usual rules of a video game, while the "CMY" character (a Lightner in both cases) represents something like "an actual person put into that position" and, through that, the ways in which the rules represented by their counterpart can be bent, broken, or otherwise subverted.
I bring this up because I think this is also useful context in determining what the nature of Noelle's counterpart might be, if she does indeed end up having one.
With what we currently have as of this writing (Deltarune Chapters 1~4 plus official events up to the Undertale 10th Anniversary stream on the 21st and 22nd of September of 2025), I think what Noelle would represent in this paradigm is the ways in which a player can actually play a game that differ from how it's "intended" to be played (or even set up to handle properly). From this, I'd infer that her blue "counterpart" would likely represent "the intended player experience" to contrast with "playing one's own way and making one's own fun, even if doing so involves things the game software isn't even programmed to properly account for".
That in mind, it's interesting to me to note that the only instances of Noelle's flavor of "freedom" the game thus far allows her to actually participate in are in the Weird Route, which is painted in a decidedly negative light. I don't think that's the full picture, though, since things like the Egg Man aren't portrayed negatively, but it does warrant mentioning.
Actually, as I write this, that does sort of follow the pattern of "introduce the Lightner's flavor of 'freedom' in a negative light before delving into a proper exploration of it and why it's valuable" that Susie and Kris establish, with Susie initially using her freedom to Genocide Lite her way through the early Card Kingdom and Kris doing some ominous and still-morally-unclear things with their own moments of freedom from the player. My extrapolation from this would be that Noelle's "flavor of freedom" will (and I think already is, via the Egg Man) have its positive aspects and applications explored more in the coming chapters, which is something I'm really looking forward to.
Anyways, in light of recent color analyses relating to Gaster making the rounds, I felt I'd throw my own UTDR color analysis into the conversation to see what people make of it.
Proposing an alternative to Universal Mother Theory I like to call Universal Ex Wife Theory. Here's my evidence
One Deltarune fandom discourse thing that pisses me off is the periodic ardent insistence by some people that information being optional to find/see necessarily precludes it being important, or that it would be bad game/story design if it was.
I dunno, more than anything, it just feels, like… dismissive to actively-contemptuous of the idea of a video game building its narrative presentation and conveyance around its interactive nature in any significant capacity.
Weirdly fascinated by the cactus Darkner in Deltarune Chapter 3 because like… a cactus is not an object. It’s not an ANIMAL but it’s a living being plants IRL DO have some awareness of and ability to react to their surroundings, albeit not in ways generally immediately visible to humans.
Copied from my comment on Skyehopper's EarthBound video
EarthBound's ties to MOTHER 1/EarthBound Beginnings… This is something I've spent a lot of time thinking about, since I actually ADORE MOTHER 1 and, while I like EarthBound a lot too, find myself frequently a bit annoyed at how many people consider it to outright supplant and replace MOTHER 1 within the series rather than both games being their own separate-but-related works with their own value. Don't pit two successful queens against each other, basically. Anyway. I don't think the fandom perception of EarthBound Beginnings as the Giygas Backstory Game is entirely unfounded with respect to how it relates to EarthBound, since Giegue/Giygas really is the most obvious common thread tying the two games together. Maybe it's just my own interpretation, but I think EarthBound Beginnings kinda reframes, or at least clarifies, Giygas's state in EarthBound as being the end result of a terrible tragedy; you get a much more tangible sense that this is an individual with a history and personality and inner life who has been turned into whatever this is rather than Giygas just being inherently Like That somehow, and, in a sense, Giygas becomes some of the most raw expressions of emotion from Giegue.