@hime these are the combinations the maid has.
So if two players are compatible, then there are a few combinations both players can be and we try and figure out which one.
Blue Dragon + Blue Dragon = Compatible
Blue Dragon + Unseen or Cult = Incompatible
Blue Dragon + Alchemist / Mercenary / Inquisitor / Fool = Compatible
Alchemist + Anyone = Compatible
Mercenary + Anyone = Compatible
Unseen/Cult+ Unseen or Cult = Compatible
Unseen/Cult + Alchemist / Mercenary / Inquisitor / Sellsword = Compatible
Neutral Killer + Alchemist / Mercenary / Inquisitor / Sellsword (All neutrals) = Compatible
Neutral Killer + Blue Dragon / Unseen or Cult = Incompatible
Blue Dragon + Unseen or Cult = Incompatible
Blue Dragon + Alchemist / Mercenary / Inquisitor / Fool = Compatible
Alchemist + Anyone = Compatible
Mercenary + Anyone = Compatible
Unseen/Cult+ Unseen or Cult = Compatible
Unseen/Cult + Alchemist / Mercenary / Inquisitor / Sellsword = Compatible
Neutral Killer + Alchemist / Mercenary / Inquisitor / Sellsword (All neutrals) = Compatible
Neutral Killer + Blue Dragon / Unseen or Cult = Incompatible