He was basically a Cthulhu role mixed with a traditional Cultist, minus the mason or shrink visit, the insanity was just for one phase.

Cthulhu
Anyone who visits the Cthulhu goes mad and speaks only gibberish during the day.
Madness can be cured by a shrink visit or being recruited to a cult.
Cthulhu dies if visited by masons.
Wins only if the cults win.
Cultist
Can choose someone at night to recruit into the cult.
Any cult member visited by mason at night will die.
If the cult leader is killed, all cult members will die.
Wins if cultists outnumber everyone during the day.