Flavor:
http://dirkgently.wikia.com/wiki/Bart_Curlish
is a 'holistic assassin' in the TV show this mafia game is based on. She is shown to have supernatural powers to not be killed or harmed in super life-threatening situations, and to intuitively kill only bad people, never good people. She states that she is guided by the universe, and that the universe keeps her healthy and tells her whom to kill.
Inference:
Bart Curlish is probably a role in the game, and they are likely a serial killer. They may also be a serial killer that has some means to convert to town (AKA universe-aligned. I think this is possible because a) that's how I would resolve the conflict between Bart being an obvious serial-killer-style character and also being a clearly universe-aligned character and b) based on my own role, I know that Lalight is playing at least a little bit fast and loose with the flavor and taking some artistic liberties in order to make the roles work for mafia and be more fun to play.
Here's the less likely thing. IF Bart curlish is a serial killer who can convert to town, they may POSSIBLY also know something about how to go about doing that, and there may be other people out there who would be able to help, EG, by targeting Bart.
Plan:
We all go around and say "If I was Bart the serial killer, this is how you could help me convert to town." If you're not Bart, just make something up. Try to make it look, uh, plausible. If you are Bart, just tell us what you know. That way, maybe Bart can become town and we don't have to lynch her.
It's sort a longshot TBH, but I mean why not?