#granted they arn't kept out of range from one another for too long

[bloo-the-dragon]

How did Sun and Moon become separate bots? Or were they always separate in your AU?

After the events of the main game and Fazbear gave the order to have the pizzaplex demolished, there was some attempt to salvage what remained in there, including the still intact robots like the daycare attendant.

Sun (and Moon) would have been in a bit of a hazy daze after the virus lifted, not really all there. After having spent so long with a foreign code in their system treating them like a puppet it was almost surreal to be yourselves again.

So when Sun got the ping to come down to parts and service he just simply followed the order. He was numb and didn't really think or care much what became of them.

Until they took Moon out.

For whatever reason, whether they wanted to scrap Moon and keep Sun or simply were pulling them out individually for decommission didn't matter - they took Moon and Sun fought back viciously to get him back again.

With the staff fled or killed Sun is left with Moon's chip. He can't put Moon back into his own head because the p&s machine requires a separate person to operate the computer, so he goes and does a lot of digging around and finds a backup endo for their model that is still intact. He places it in the cylinder, operates the computer and Boom Moon got a new body.

Needless to say when Moon wakes up he is very confused and initially panicky because he can't sense Sun in his head. They don't let go of each other for a long time after.

Eventually they both head back to the daycare area and stay there, not really knowing what to do (until a certain dragon shows up sometime later)