Not sure if this has been mentioned before or not as a possible role, but I keep reading it on the Epic Mafia wiki and would like to see it in game.
https://wiki.epicmafia.com/index.php?title=Jailer
Allegiance: Town
Ability: Jail one person each night, Only if no one was Lynched that day.
Jailed person and Jailer can communicate during the night, Jailer will have option to Kill or let Jailed person go.
Pro: Essentially works like a Roleblock, but only if no one was lynched.
Can choose to kill Roleblocked Person, sort of like a Vigilante choosing to shoot.
Jailer is anonymous to Jailed person, appearing only as "Jailer" in their private conversation.
Con: If someone is Lynched, effectively the Jailer cannot do anything.
Tweaks: Perhaps as a Balancing issue, give the Jailer a limited amount of times he can sentence someone to death, so the Jailer would have to think carefully without abusing his ability.