What If Souls With The Same Colour Are Linked In The Underground?

What if souls with the same colour are linked in the underground?

I've always found it weird how Frisk became entangled with the first fallen human. Why is their name on our stats? (Do they gain LOVE even if our kills were not their fault?) Why do they narrate our world? Why do we hear the last thing they heard before they died, when we die? Why do the game's files seem to imply that we use their save file when saving? They're dead, right? They were awakened thanks to our determination? That doesn't explain much if I'm being honest.

This isn't really a theory, more so a thought. What if souls that are the same colour become linked to each other in this way?

So if a kindness human fell down after a neutral ending, the other (dead) kindness soul would awaken and narrate their world, their name would be on their stats, and upon death you could hear something they heard. It's a bit odd, especially when you think about multiple humans of the same soul colour falling, but I think this could make for really interesting AUs.

All the sprites from the recent newsletter! Notably we're getting some new Flowey sprites for the first time in what seems like AGES!! Have fun Flowey fans :3

Because Frisk does not remember a true reset. On normal resets, Frisk turns around and shakes Sans's hand before they are told to. The only reason this interaction would not occur on a true reset is if Frisk didn't remember it.

If you go back to the game after a true pacifist run, Flowey says "Let everyone be happy. Let Frisk be happy." A true reset goes against what Frisk wants. Normal resets are performed by Frisk. True resets are performed by YOU.

(Note that the question is HOW aware, not IS he aware)

EDIT: I think my question may have been somewhat misinterpreted based on the responses.

The "all his knowledge is just based off observation" choice implies that he has LESS deja-vu than other Undertale characters. If you think that Sans has no more and no less deja-vu than monsters like Toriel (Remembering your pie choice) and Undyne (Getting a feeling you might have been friends before), pick the second option. Choose the first option ONLY if you think he has a weaker/non-existent sense of deja-vu compared to them.

(Note that the question is HOW aware, not IS he aware)

EDIT: I think my question may have been somewhat misinterpreted based on the responses.

The "all his knowledge is just based off observation" choice implies that he has LESS deja-vu than other Undertale characters. If you think that Sans has no more and no less deja-vu than monsters like Toriel (Remembering your pie choice) and Undyne (Getting a feeling you might have been friends before), pick the second option. Choose the first option ONLY if you think he has a weaker/non-existent sense of deja-vu compared to them.

*GASP*

Doing more than one? Choose whichever you found the most helpful. ❤️