Observations.txt

He/she is five people. Strictly speaking, he/she lives in five separate worlds. This is just a hypothesis right now, but it's probably true.

I will now write out the evidence for this outlandish theory.

He/she is my friend and I met him/her in middle school. At some point, I noticed something unique about him/her.

[His/her personality completely changes depending on the day.]

So far, I have identified 5 of his/her unique personalities.

All five of his/her identities are completely different in their hobbies, preferences, intonation, favorite foods, and right down to their stamina.

There aren't many differences in their actual physical appearance.

If I had to point something out, it seems like their eyes are unique.

Some people may think, "Perhaps he/she has five separate personalities and he/she switches personalities depending on some external factor?"

If we assume this, almost everything about him/her could be explained. But it cannot explain everything I've observed in reality. It wasn't my original intention to frame it that way, but for the sake of simplicity I'll use the word "personality" and the next point shall explain why:

[No one besides me is aware of his/her personalities on that day.]

And the most crucial part is:

[All traces of a personality from the previous day will disappear from the world the next day.]

Essentially: everything in the world, besides my memories, is completely overwritten by that day's active personality. With these facts in mind, I could only come to the conclusion that I mentioned previously…

But I imagine you're starting to get confused, so I'll share some anecdotes.

To make things easier to understand, I'll use the numbers I assigned to them when talking about this.

As I mentioned before, I met him/her in middle school.

Even though we were at study camp, Personality I was knocked out cold on his/her desk, so I talked to him/her…I think. He stood, despite his uncertain footing, then he turned to me and started arguing with me, which I think left a strong first impression on me. When it was time for us to go home, he fell into the shoe locker and made a loud noise, but when I ran over to him with tears in my eyes, he just laughed it off as if it was an everyday occurrence.

The next day, I think…he/she came to school as Personality II… At the end of the day, right as I passed by the staff room, she trudged out of the office looking disheartened. I heard that she ran right into a windowpane while playing tag with some classmates. When I saw the bandage coiled around her head, I could tell she was a bit of a tomboy and I couldn't help but giggle. Then I said, "Man, didn't you get scolded yesterday too?

Looking back on it, I think my memories back then were also "overwritten"... I'd completely forgotten the strong first impression that Personality I left on me the day before. I guess it would be more accurate to say that my memories and the world matched up with Personality II.

Still, that day was when I noticed something strange about the world. It was probably twenty days after I met the five of him/her…? I think after that point, my memories stopped being "overwritten."

First, I realized that I was aware of the existence of all five of him/her simultaneously. On one occasion, I was talking to Personality IV. I was worried about her head injury, so I casually asked her about it. Then she said to me, "My head…? Did I have a head injury?"

My whole body was assailed by an uneasy feeling.

An eerie premonition made me turn my gaze towards the classroom window that she should've broken a few days ago, but it had mysteriously returned back to normal. The replacement pane wasn't supposed to arrive until next month, so the cracks were crudely concealed by packing tape, but it was like the events of that day had never transpired. That's right. The world of that day was no longer reality.  She stared at me, perplexed, her head completely uninjured. However, surely, somewhere deep in the recesses of my mind, the memory of her head wrapped in a bandage remained.

To sum it all up: the reality where Personality II broke the windowpane with her head was overwritten by IV's reality, where the windowpane wasn't broken. What was most likely happening at that moment was that my memories (probably about a hundred days' worth?) of all five of him/her from the moment I met her were suddenly instantly decompressed in my mind. I don't remember much of what happened after that; probably because my brain was busy catching up with this impossible amount of information.  I didn't realize it, but I was even absent from school the following day. I must've been acting really out of it, because my parents were so nice to me that it was almost scary. After sleeping on it, I regained my composure, but I could only remember one thing. I could only remember IV from yesterday. I had no memories of any of the others.

At this point, I was convinced I was going crazy and becoming delusional. I thought that everything I could remember of him/her, except for the one I saw yesterday, was just my imagination. I felt uneasy, like I was watching a movie where the main character took some weird drug and couldn't discern between dreams and reality. I love it when that sort of thing happens, but now that I was experiencing it myself, all I felt was anxious. I didn't have it in me to believe my current reality, and I didn't have anyone I trusted enough to tell this to.

With some apprehension, I returned to school the next day, and the window wasn't broken. My heart sank and I wondered if I was really just imagining everything, but my classmates greeting me normally put me at ease, like they didn't think I was crazy. Then someone patted my shoulder. I turned around and there she was. Though it wasn't her from the day before yesterday, it was the her I met at the art gallery, the one who I had already decided was a figment of my imagination. Unable to swallow the reality of the situation, I couldn't do anything but stare at her, and then she said, "Here. It's the pencil I borrowed from you yesterday. I forgot to return it… …What? Are you mad at me?"

From that day onward, I started to analyze and investigate the structure of the world every day, but…I'll just leave out the details. It took me a long time to arrive at the conclusion I mentioned at the beginning. I've already written out a lot, but just bear with me for a little longer. I would also like to include some examples of how I acted to avoid rousing suspicion from those around me, a technique I mastered by observing the world.

For example, on the day I went back to school he/she was there. If he/she had dark circles under her/his eyes, and he/she was swaying as if he/she'd fall face first into the shoe locker, then it definitely had to be Personality I. He'd definitely stay as Personality I all day, of course. So then, I'd think "so today's world is the one that Personality I lives in," and I'd change my thinking accordingly. So then I'd become "The me who lives in Personality I's world", and I'd alter my demeanor to match. If I went to Personality II's club that she joined the day of the entrance ceremony, then her locker wouldn't be there. That's because Personality II doesn't exist in this world.

Then take this other day as an example. Today, he/she is sitting alone on the rooftop and staring at the ocean, that has to be Personality III. So if I'm careless and bring up Personality I's habit of taking photos, Personality III would just stare at me blankly, right? Because in the world that day, the only one who knows about Personality I is me.

Whenever I made a mistake like that, it was best to stay silent and endure the situation. It's better than digging my own grave by coming up with some weird excuse for it, you know? And besides, he/she was a kind person at heart, so they wouldn't pry too much.

I've probably reminisced enough and laid out enough examples here, but I hope this helps you to understand the crazy theories I laid out at the beginning of this. To be more precise:

The five of him/her live in separate and distinct worlds, and each day, everything in the world besides me is overwritten to become the next…or something like that.

Even though I was the one who came up with this theory, I have to be honest that I'm not fully convinced that I even understand it. Even now, my instinctive reaction is to be confused–wondering if this crazy sci-fi-ish scenario can actually happen–but my reason is accepting the reality before my eyes.

But…the reason why I am the only one who isn't "overwritten" still isn't clear to me.

I also considered the possibility that I exist in each world–essentially that the worlds are not "rewritten" per se, but that I wake up in a different world each day, but I rejected that hypothesis since it doesn't line up with what I remember.

The him/her I remember is…

On Monday, Personality I showed me his photos.

On Tuesday, Personality II let me watch her club activities.

On Wednesday, Personality III promised to go see the ocean with me.

On Thursday, Personality IV spent time with me for the first time in a while.

On Friday, Personality V took me with her to visit an art gallery.

That's how it is. Essentially, as I described in my previous anecdotes, I only have bits and pieces of memories related to his/her personalities. If you were to ask me "Who did you spend Monday with besides Personality I?" I would have absolutely no clue.

If we suppose that the theory "There are five of me" is true, then there would be a different version of me that spent time with each of him/her in their respective worldlines, and the memories I have of each universe wouldn't be "overwritten" (supposing this theory is true), so the memories I have of him/her would be continuous.

But on the contrary, if I were to ask Personality I "What did we do on the days besides Monday?" he would have memories of myself that I wouldn't know about. To be more straightforward, you could say that my past in other worlds was fabricated. So the theory that "There are five of me" doesn't hold any water, then maybe the world being "overwritten" is also associated with "fabricating events that would have happened between that world disappearing and materializing"?

When he/she and I got into high school, another fact made itself apparent to me.

"The number of days where I was in Personality IV's world increased."

To be honest, when we were in middle school, whichever world was overwritten was pretty evenly distributed, though it wasn't completely random.

On the days where we'd have a physical fitness test, he/she'd be Personality II…So I felt like there was a pattern based on the day's events and which personality that showed up.

Though the reverse is also true. If he/she was to be Personality V, then she would probably go to an art museum after school…and so on.

But there are still many questions that need to be answered regarding this pattern and whether or not it's intentional. (Since he/she's unaware of being "overwritten", it's hard to believe that their intention is the cause of it.)

But back to the main idea…

In the most recent month, the worldline has always been Personality IV's worldline. The upward trend mentioned at the beginning of this section seems to have started when we got into high school. Based on my experience, at the time of writing this paragraph, the worldlines besides Personality IV's have only appeared for about 20 days in total since the beginning of the year. That is to say, on an individual level, Personalities I, II, III, and V's worldlines only appear for about 5 days out of the year.