So I finally started playing epic mafia, and the most fun and crazy of all the roles to me was the lightkeeper. I don't think it would work as a role in SC2 mafia, because people hate playing citizens as it is, but it would be great as an addition to the jester.
For those that don't know, when a lightkeeper dies, the next day town chat is all anonymous, and all votes to lynch that day become anonymous. I feel this would be a cool addition to the jester role, instead of having someone die when he is lynched, make the previous sentence happen. This removes randomness from the game, which is a good thing, and adds more chaos and fun, which is a good thing. Town still won't want to lynch the jester, because it makes an accurate lynch the next day very difficult.
Flavorwise, it fits, as killing the jester while he's in the town meeting unleashes his bag of tricks into the town, or something of that nature. It makes more sense than someone suiciding of guilt after killing him. Since the jester has few options, this could be added as an option instead.