Got 2 ideas.
I am more interested in feedback on these two
"Thief" A role with a mechanic that steals limited use abilities. For example, takes bullets from vigilantes/jailors, disguises from disguisers, etc.
Could possibly just be made a mafia role that screws with town, or a NE, NB, whatever.
"Masquerade" Swaps roles with another player. Can't swap with someone who has already been a masquerade. Obviously this would fall into the Neutral Chaos slot, because it alters the game on a fundamental level. Would have to swap BEFORE killing happens, otherwise it would make revenge kills a bit too easy, i.e; new godfather targets Masquerade, risk is that Masquerade switches back to mafia.
These are not very novel, added because I did not want to make a new thread
"Obstructionist" Limited use ability, prevents people with day abilities from using them. With the current investigation results, it would make it possible to prevent a mayor from revealing and maybe get them lynched. Mostly a hard counter to jailor locking up single GF indefinitely. Definitely mafia.
"Fate Binder" I have no doubt that this has been suggested already, but you pick two people at night. If one dies, the other dies. I'd say NE on this one.
"Kidnapper" I am pretty sure this has been suggested by now. I got the idea from Ultimate Werewolf's Hag. It would actually work as town or mafia. You just make someone unable to chat, vote, or do their ability during the day. They also can't be voted. They're just gone for the day. Can't be used on same target twice.