Okay so I believe this is a terrible name, feel free to change it, but the Vote Manipulator can “steal” a vote 2 times in a round. The Vote Manipulator knows who the Witch or Scout is, but not vice versa. If the Scout or Spy bugs the person the Vote Manipulator chose, it will tell the Spy/Scout who the Vote Manipulator chose, but not what the manipulated person was manipulated to choose. I say that there could be either a Ambusher or Vote Manipulator in a round, and the Vote Manipulator could make use in situations like saving the scout or witch, or getting someone who you think is a major good role, like Detective or Psychic out, and nobody suspects anyone. When a player is manipulated, text saying “You have been manipulated!” shows on the lower part of the screen. You can change the name if it sounds bad, because I couldn’t think of anything else, or make it a full addition or having a chance to replace a role, like how psychic can replace spy and vice versa.
I don’t get why they should know how Witch/Scout is. Those roles aren’t powerful and don’t seem to help out this role. Still an okay idea.