Well for freeing the girls in my friend notes this is what he found and he even showed me it works
“Freeing Chiku “
Step 1: Have the research “Missing Persons” Level at 275/1000 “VERY VER IMPORTANT!!!!!”.
Step 2: In night 2 when the power is out choose the “Tell the girls they have to be good and wait for you Upstairs” (it will help you learn more about the girls).
Step 3: In night 5 do Replace camera, Restock Vodka, and save Prepare Dough “FOR LAST”.
Step 4: Now Choose “Tell Chiku what I’ve found” THEN (this is important) choose “Tell Chiku her real name”.
Congratulations Chiku is now Free from Mr Smith control.
“Freeing Fexa”
Step 1: Have the research “Missing Persons” Level at 500/1000 “VERY VER IMPORTANT!!!!!”.
Step 2: In night 2 when the power is out choose the “Tell the girls they have to be good and wait for you Upstairs” (it will help you learn more about the girls).
Step 3: In night 7 choose “Type out on my phone to meet in the Pizzeria” Then “Speak her true name and see what happens”
Congratulations Fexa is now Free from Mr Smith control.
“Freeing Frenni”
Step 1: Have the research “Missing Persons” Level at 600/1000 “VERY VER IMPORTANT!!!!!”.
Step 2: Step 2: In night 2 when the power is out choose the “Tell the girls they have to be good and wait for you Upstairs” (it will help you learn more about the girls).
Step 3: In night 9 Choose “Meet Frenni in VIP Booth”.
Congratulations Frenni is now Free from Mr Smith control.
“Freeing Bonfie”
Step 1: Have the research “Missing Persons” Level at 800/1000 “VERY VER IMPORTANT!!!!!”.
Step 2: In night 2 when the power is out choose the “Tell the girls they have to be good and wait for you Upstairs” (it will help you learn more about the girls).
Step 3: (Still in the Works)
Now Bonfie guide is still in the works and we might be able to free her in the next update which should be in April (i think it just a guess though) also night fox works gave him a few hints about night 7 for lexy and the magic shop need some research to unlock it that all he told me so i need to do some investigating myself to see about the hints the dev gave him plus if he finds anything else before me he will let me know anyway this is all he had in his notes so far.
Edit: As for paranormal research well I believe that once the full game is released that research will play a huge role in freeing Marie and Lexy plus it might also shed some light on Zero past as well both “missing person and paranormal” research will be important for the girls and their endings for the game.