Here is all I got so far with my own silly fnf au idea! No creative name right now other than FNF_ you can tell I'm amazing with titles.
GF_+BF_ have a van so there feet don't hurt from all that walking to new rap battles. It smells like weed + incense in there... I like to think they travel a lot instead of having one home since the two get into alot of trouble.
PICO_ has his own apartment that Gf+Bf just barge into unannounced whenever he's around the area.