My list of Relsay headcanons, let's go!
Unfortunately, I came across fandom of that gremlin too late, and a lot of content about him has already been lost, but this is what has accumulated in my head based on what I found about him, and I find it interesting. :)
Topic number 1: Does Relsay represent some kind of object in the Light World?
In fact, I highly doubt it. Relsay exists as an anomaly in the corrupted Dark World of pirated Deltarune, where I doubt about existence even its own Light World.
Judging by the animations we have left, Kris and Susie ended up in different Dark Worlds from school because Kris is exactly has controlled by Player who purchased "Delta Adventure FREE," where Relsay lives. Actually, I don't think he can be anything in the Light World, because there in some item form already exists Ralsei.
From this side, Relsay's story is quite dramatic, because in the first episode he tells Kris that some Fountain needs to be sealed, but there might not be any other Fountain there.. Except his own.
He'll roll and spin around there with Kris, then they go back to the castle, where Kris will seal the Fountain of this World with Relsay, who will be happy that he fulfilled his destiny - to give adventure for Kris.
Relsay didn't talk about some prophecy or other stuff about saving the world from Roaring, because none of that was prescribed in his world. Because his world exactly shouldn't be existing. Although the prophecy itself is possibly recorded in Relsay's memories. And It seems he waited so long for heroes to come, that's why he created his dark Kris(Kage) and Susie(Sooz), but couldn't give them personality, so his Susie is a blind(literally) killing machine, and Kris is a cold, pale and unfeeling shadow of their former self.
So when the real, living Kris arrived, Relsay was now absolutely terrified of losing them. He didn't care about the second hero anymore, as long as he had someone "real" by his side.
Topic number 2: Relsay's real attitude towards Susie.
I once translated a mini-comic for my fandom comrades, where when Relsay saw Susie, he was only happy see her and wanted to continue their adventure together.
I found this drabble to be more canonical in terms of his character, as opposed to more popular interpretations, where Relsay is shown as a manipulative, jealous schizo bad guy who doesn't even allow Susie to be near Kris, while in the pictures with the Relsay presentation from his author, there was also a redrawing of the moment where he is eager to hug Susie, too.
So.. yes, Relsay wouldn't have threatened to kill her the first time they met. On the contrary, he'd have started trying to playing friends with her too. But separately, Relsay wouldn't have minded slandering Kris about Susie with all his might. Also on the other side he would gently piss in Susie's ears about all her actions, telling that Kris didn't need her that much, since he was much better at fighting, etc.
That is, Relsay would try to sow the seeds of discord among one another in order to portray himself as [#1 FRIEND] for each of them individually.
However, Kris is still number one for Relsay personally, in that sense, if Kris asks him to kill Susie, he will do it without much thought, because, again, who the hell needs her? He does not even let the "enemies" touch Kris, which means neither additional strength nor healers are essentially needed in their duet.
But on the contrary, if Susie demands Relsay to hurt Kris, he will fly into a rage with screams, "O H, Kr1s, I t0ld yoU sh3 w4$ UnreliAble, s33! She [BETRAYED] you! I'm still your BEST FRIEND!" and will most likely kill Susie herself.
However, overall, Relsay doesn't mind her, since according to the "prophecy" as Ralsei's copycat, he's obligated to accompany both heroes. So he'll have to tolerate Susilla and also "be friends" with her, at least until the first reason to suspect her of being a real danger to Kris.
But, he'd be extremely jealous if they spent too much time interacting with each other, or anyone else, for that matter. All the other "enemies" not allowed. Mute, ban, and blacklist.
And the most crazy thing here is that Relsay does not see anything intentionally bad in his actions and sincerely considers himself an example of an ideal friend, and everyone around him is a potential traitors(Susie), which is not shameful to slander, and enemies(everyone else), against whom it is better to play it safe and kill them immediately, otherwise they will hurt Kris.
Topic number 3: Is "Pacifist route" can be possible with Relsay?
Well, maybe.. We know that when it comes to facing enemies, if there's even the slightest chance for Kris be harmed, Relsay kills them, despite Kris's protests, so his reaction to the "Pacifist route" wouldn't be very positive. 🤔
If Kris had convinced Relsay to let them act on their own, they would have had to be extremely cautious in battle and avoid any attacks.
Took damage once? Failure. Kris would have been unlikely to be able to heal in that situation. Also I don't think Relsay can use heal prayer, just like Kris, who would need normal food to restore HP. Maybe dark candies could be finded, but everything else is in stores, and that also involves interaction with "enemies" = more danger.
I think Relsay would have considered Kris too weak at first and certainly wouldn't have allow them to act, but if they asked for one try and had the Player act in "no hit" mode for them, then maybe something would have worked out.
Let's say after recruiting Susie into the gang, the requirements for the "Pacifist route" might be relaxed. Kris would command Susie to take action, and she is one who will be "allowed" to take damage, but in the same chapter, she'd have to learn healing so she could, well.. Heal herself, if need be. ¯\_(ツ)_/¯
Topic number 4: What, in principle is Relsay's nature, if his world were included in the canon?
How about this plot twist? Relsay is the Titan Spawn, why not?
"When did you start being yourself" theme not foreign to him too, I think. Titans don't understand the concept of mercy either, so what would happen if one were given the form of something that, on the contrary, embodies the concept of mercy in Deltarune and was tasked with playing its role literally? Right, absolutely fucked up crap. 👍
I also read a theory that if a new Dark Fountain were to be opened based on Ralsei's Dark World memories, then according to the precepts of the Gerson statue, the training dummy could become Relsay.
But the Titan Spawn version, as something that fits Relsay as entity that come "from a world darker than dark worlds," seems more epic to me. 🤣
Moreover, the idea that they can be molded into something resembling ordinary children is not new.
Art made by: @MattlikeFNF(x)