Here's a boy, no older than nineteen, quietly sipping from a mug in an interdimensional bar. There is a rather large rather ponty-eared panther lying next to him, purring softly as the boy scratches its head. Floating in front of his face is a book, which he is absently reading. Given that he didn't walk in from the door, it can be presumed he is probably a tenant who came here from one of the rooms upstairs at some point.
Fernando looks at his wristwatch and then looks up and says without a pause, "Five hundred forty-seven days, eighteen hours, nine minutes. With a thirty minute error margin. But that is how long it was for me; due to time weirdness it could've been way longer on their end."
"I can't check very casually. Sadde found a magical artefact of some sort that allows them to create doors to other worlds, but they can only be opened from one side, so Sadde cannot return through the doors they've made. The terrible creatures are very dangerous to humans, and that world is on the brink of war with them, but unaware of it. Sadde won't be harmed, though."
"I developed my world's magic farther than anyone else, but this required sacrificing the largest part of my magical abilities, and I wasn't finished yet. So I died and was reborn. In two pieces. One piece has my memories and old magical powers—that's me—but the other is completely new and can develop their own abilities farther than I can. They're called Sadde, too, by the way. My world isn't paused, because I'm coming here in a dream, and I can't leave Milliways without waking up. I used to be able to see the future rather well, and managed to make myself immortal, but couldn't get farther than that without this little trick."
"I have not met my other self yet, and they don't know I exist. The manner through which I achieved this separation means I can't interact with them much without risking merging with them and losing all our progress, at least until they've developped and become distinct enough. They do have a you and a Felix but not a Thomas."
He lowers his eyes. "No. There might have been, once upon a time, but nowadays I'm limited in what I can accomplish. I think... Sadde is going to find you, eventually, but it'll cost them dearly. I don't know whether Kaede and Felix will find you or the other way around. I'm sorry."
He laughs. "There's another me, out there, who's affecting the world. My world, I mean. And eventually they'll be different enough I'll be able to just act again and they'll surpass me in power and that's exactly as I planned it. I do so love it when my plans work."
The two-thirds of the triplets return. Fernando comes back with a purple eye that is fading before their eyes.
"Thomas would like to make it known that me staying here by myself was actually an act of absurd selfishness. Which I actually agree with and already knew at the time of decision."
"There is also no point in you suffering any longer than you have to, and you were unfairly prioritising their feelings over yours, and depriving them of the opportunity to help you as they're meant to. You were doing all the emotional labour by yourself, but doing emotional labour is part and parcel of loving other people, and just like someone would want to mourn a dead loved one, not all suffering is bad."
"Yes." He half-smiles. "I do wonder if you've ever watched anime..." He stands up, reaches for his back pocket, and grabs a card. From another pocket comes a small golden key. "The key that hides the power of darkness, reveal your true form to me. I, Eriol, command you under our contract. Release!" The key grows into a long, golden staff with a large sun at the upper end, with light effects and wind.
"Wrong anime, I'm afraid. You'll figure it out when you look it up later today, as well as all the references. I have better excuses than your version of me, however." He shakes his head and suddenly Milliways becomes blackness. There is a circle of green light under Eriol's feet, and he throws the Card in front of himself. It spins and stops in place, and he says, "Return, undo that which Time has done, show us what has already come! Release!" He touches the card with his staff, causing it to glow brightly and then envelop their surroundings, changing them.
They discuss how to combine magic systems and solve each other's problems. Felix is his usual supersped, extremely loving and caring self, and Kaede is Kaede. The triplets and Katur's attraction to her becomes increasingly obvious, but the opposite is not true until she mentions she wants to flirt with them.
"I told this to your brother before he opened the door for the two of you. I died, a long time ago, and made myself reborn twice. I'm the half with the memories and the old powers and limitations. There is another me in my world—they are also named Sadde—and they remember nothing, but they are not limited by my sacrifices, and they can use the tools I made, so they can become much more powerful than I ever could. One of these tools is what threatens to cause apocalyptic damage, but it will be averted and the tool mastered and used for good."
The slideshow of tears never really stopped. Past Katur holds the door just like present Katur is doing, and they follow their shades back to the great warehouse where they set their portals up.
Once the portal to Sadde's Earth settles, Kaede casts the invisibility spell on him and he grows wings. He's visible anyway, but that might be just because the spell anteroactively retains its exceptions for the triplets and Katur.
"My suspicions are that Sadde will not ever want to, themself, be with anyone other than the five of you, but that they will not care if you are with anyone else. I also expect they might join in any... activities... where you are involved regardless of who else is but won't have any enthusiasm for others."
"I cannot really show the future, and when I say I can see it it's not anything as high-definition as this. I can get answers to certain questions, almost always vague, and I can know various things that will happen without actually being able to watch them happening. But getting answers from the future was how I figured out that the near-apocalypse was the best I was gonna be able to do."
He shakes his head. "But... I always come with... him. It seems to change who exactly he is, in my past life he was a teacher and master, my other self has him as a father—Kaede and your Sadde do, too—I in particular don't have a him but that's because I have all my memories. He's—important to mes, somehow."
Fernando distributes the binders around. They are sorted between things like "World profiles", "Tech resources", "Magic resources", "Issues and threats I", "Issues and threats II", "Plans and solutions", "Unsorted" and "Misc. & Etc." Which are further categorized and color-coded.
Fernando gives them a quick overview of the organization system. Mostly sorted in various forms of accessibility and priority. "My plan is to write all of this in multiple books for various levels of tech advancement so people can buy them. Books with sensitive information are going to be coded or ciphered. At least one of my books - likely my first - is going to be something with the codes. I am likely going to write "I dedicate this book to" and a list of pen names for my other books too."
"Publishing things allows Bar to sell them. This means we can facilitate the distribution of information by publishing things in our own world - we only need to sell three books and Bar can make them available to anyone that walks in. The obvious downside is that anyone includes potentially very evil people and Bar would still sell them, even if it was Adolf Hitler seeking nuclear secrets. I have tried, but failed to convince her to filter better. And all of Bar's information is already available, the most I can do is not make it easy for hypothetical Hitlers to get to it sooner. Thus I can hide under codes, ciphers and subterfuges. Most people wouldn't know me well enough to think it was out of character that I published a knitting book or something, but my alts, their families and theirs yous and Katurs would notice. Thus they would get curious and investigate and then find out the secret messages where I can condense the shortcuts for nuclear secrets and other sensitive information, or even personal things. It even allows for continuous one-way communication even if we never find Milliways again."
"This place was designed to mock and torture you personally. That is the only explanation. A well of resources, a bunch of worlds to save, but everything requires luck, a lot of work and self-flagellation. It gave us Kaede and Sadde, but took them and Felix from us- and don't even think to blame yourself for that! And to top it off the entire fucking thing manifests in the fucking ridiculous fucking facade of a bar. This place is going to eat you alive until there is nothing for the others to return to."
"Don't talk to me about mindsets that are not good for me. You know what I was actually thinking when I heard about the ones of ourselves that come in twin? I was thinking 'I hope they can be functional without me' because the two care about every fucking thing and they are more likely to let that caring burn them from the inside out. Did you know that when they heard about scope insensitivity they spent a while wondering how to use magic to bypass it? And my reaction was 'that's what they look with a bias that tones down their behavior?'"
"Fernando, you want to accomplish the most good for the multiverse. So do I. There's a reason I didn't write these binders, even though I could have. I can't affect it now, I don't have magic that does interdimensional travel, there would be no point and if I tried I would spend myself and end up not helping anyone. Now, you spent months here. Has anyone else walked through that door since?"
"It will become rarer," he predicts. "The landlords did not intend for Milliways to be used like this, and however much I disagree with them, the fact is that Milliways is not an effective way of contacting other worlds and fixing them. The actual consequences of spending yourself here while waiting for a world in need to walk through the door is that you won't have enough you left to help anyone."