This is the first key visual for Re:Zero all the back in 2015, and I think it could highlight some important things. First, I’ve highlighted two depictions of things that are either birds or closely resemble them. Given this is Re:Zero, these two objects, which could very well be birds or were intended to be seen as birds, could be important to the plot. Of note is that two birds were also initially present right as the From Zero moment was about to begin at 17:22 of Episode 18 before tons of them emerged at the height of From Zero and also during Subaru’s speech in Episode 57 in Season 3 when they hung out where Emilia was held captive at 25:37 before flying over to the government office where Subaru had his speech at 25:45.
Here’s a link to the image of the birds in Episode 18:
Here’s the links to the images in Episode 57:
Birds were heavily featured even when Subaru was summoned to Re:Zero’s fantasy world:
So there may have been an unknown force observing Subaru since he was summoned through the birds in addition to Satella, who we know is always watching Subaru.
Given how important the number three is in Re:Zero, it wouldn’t surprise me if there were actually three forces watching Subaru from the moment he stepped out into Re:Zero’s fantasy world. Who could it be if such a thing is indeed happening?
I believe it is Echidna who is the third force that has been observing Subaru since the beginning. Echidna literally said at one point that she had watched Subaru every step of the way of his journey after he was killed by the Great Rabbit, and while it could’ve been a false statement since she has literally lied to Subaru three times already, I’ll share why I believe that she was telling the truth.
We’ve known since the beginning that Satella is choosing Subaru’s save points, which begs the question about how she knows at what point Subaru can make a difference. A lot of anime-onlies believe in the theory that Satella travelled back in time four hundred years to ensure that this current Subaru succeeds, and although I am adamant that this theory is false I will nonetheless use it to support my argument.
Let’s say that this is true and Satella actually is a future variant of Emilia. How would she know in the current day at what points Subaru can make a difference so that he succeeds this time? The answer is that she doesn’t. Even if she knew how the previous Subaru’s run through as the hero worked, that doesn’t mean Satella 100% has an ironclad way of knowing what’s the best point for him to still be able to make the most impact given what failed last time would obviously fail again while what would’ve worked last time may not this time. The only way to know for sure is with future knowledge for this current world, which is why I’m now proposing that Satella has a contract with Echidna in that Satella shares her field of vision with Echidna for some unknown price we viewers aren’t privy to.
If Satella did have this sort of arrangement with Echidna, it’d explain why she makes the save points she does, and it’d be ’cause she consults with Echidna beforehand, who we know to have future knowledge and acts with it in mind as shown when she turned Petra’s handkerchief into a spectral knife for Subaru to kill himself after he revealed RBD to her. Echidna also looked forward into the future hundreds of years ago given she made Puck with the express intention of defeating Melakuera only for Puck to lose his memories so that Roswaal could draw Emilia into his camp with Puck losing his memories of the Roswaal who co-existed with Echidna four hundred years ago, making him oblivious to Roswaal’s Soul Transcription. Evidence suggests that Echidna has been regularly using her Authority since at least hundreds of years ago.
Now I will draw your attention to the rest of the mural’s images, which show a city split in half with destruction to varying degrees all around it with the top right of the sky having cracks, similar to when Echidna’s Dream Castle shattered and when Beatrice’s Forbidden Library disappeared for good. Thus, I propose that the mural is depicting the beginning of the end of the world. I believe that Satella, Echidna, and the unknown force are probably working together to push Subaru to break the cycle of the world being constantly destroyed and reconstructed that has been alluded to by Melakuera in stating he has faced world-ending crises countless times that may be the result of an unrevealed Authority that affects the story path of the world. I believe hundreds of thousands or millions of years ago in the world’s history, an unidentified hero of the past chose his lover over the world in a moment of weakness, dooming it the destruction, and the big bad of the series used his Authority to keep the world biased towards repeating this general cycle, and it’s up to the characters from four hundred years ago to push Subaru to defy the unnatural story path so that this cursed cycle will end, bringing about an age of freedom from predetermination.