Here it is, the duo in the "canon" Timeline. I'm a tiny bit tired of making this. Anyways, here is the introduction to them.
Matthew Emily - Security Puppet
After found dead in a alley next to the Freddie's Pizzeria, the Puppet save him and Nathan to their animatronics. His first instinct is panic as he is now in an animatronic, but calm down as he adapts to the situation. Now accepting that he is now "dead", he begin to explore his testing his animatronic body, and may rough it up by preventing a few incidents from fights. He is more sober and cheerful attitude as he, Marionette, and "Amalgamation"(albeit in the shadows) looks after the kids in the Pizzeria when Henry sold his entertainment restaurant. And some occasionally pranks with Nathan on the night guards.
Nathan Emily - "Amalgamation"
While Matt mind is intact, it's hard to say with Nathan after his "death", it "fragmented" his mind badly as he can flipped from being charming to wrathful. Kind and malicious. The only times where he is in his normal self is Matt, the MCI's and his family. Will go to extreme lenghts to "catch bad people". He usually punish them by e̵̱͕̝͆̅͛ ̵̡͒̋Å̸̡̲̤̠̂̓t̴͕͓̱͂̎̓i̶͈̚n̴̙̥͑͆͆ ̶̨̛̦̪̝̂̎̀G̷̬̀̃͆ ̸̠̳̜̋ͅt̶̲͒͆H̷̼͉̥̅̕e̵̫͋̋̌͝ͅm̸̯̝͗ ̸̢͎̆̏A̷̦͓̎ ̸̟͓̪͗͗͠ľ̴͓̱͐̕͜͠İ̶̢̧̤̩̀v̴̥́̊̊͜ē̸̺̳̱ ̷͎͙͎́̓̀̐͜ą̶͕̖̠̀͑͌S̶̼̆ ̴̗̠̲̼̂̈́͘i̷̬͑̋͑t̵̗͑͛ ̴͖̼͓̈́̃ị̶̐͝Ş̵̛̝͛ͅ ̶̡͔̯͛t̸̪̻̓̐h̷̨̟͎̦̾͂̎̌Ę̵̳͗̂̏ ̶̘̂͑̚Ö̶̠̝̿͝ ̶͚̗̣̖͂̈́͂ǹ̷̖̼͐̆l̴̪̘̃̈́͝ͅY̶̥͆̓ͅ ̵̡̺̥͛̈́̔̇ẅ̸̢̗̻̺̇͑Â̵͓̰̰̾̍ͅy̷̯͔͌ ̴̛͓̜́́t̶̩͖̬̭͝Ő̶̘͙̖͎͛̉ ̶̥͗r̶̪̺̩͉͛E̶̡̛̟͂̉ ̸̧͔͇̾̀͐p̶̺̣̈̐̋à̶̜̩̗̂͝Y̶̙͈̓͒̉ ̴̰̪̬̣͗̽̑T̴͍̹̼̈̔ͅ ̶̙̄H̴̙͔̹͒̋̇ ̵̩̣͔̳̃́̿E̸̥͉̤͈̅ ̷̨̮̝̱͑̈́̏I̷̯̪̾̾̃ ̶̟̞̾R̴̲͙͋ ̶͈̩̍̈͊͜͝ͅ ̵̦͗̆̇̈́s̸̼̃̀ ̴͙̱̈́͘Ḯ̷̧̯̞̪̀̚n̶̖̉͗̔̕s̴̲͇̰̠̊̏͐.̴̢̩͇̝̒ even though in his "fragmented" mind, he is not stupid to know that the night guards has nothing to do with the MCIs as they are still alive. He along with matt and marionette looks after the kids as their is nothing else to do.
(And also he MAY participate at "certain" small events in the past because in his words "the Timeline is already altered the moment their existence is "recorded" in FNAF." Even so, he also choose not to interfere with other events as they are "canon in their past lives.")