Neutral

Neutrals have a very specific purpose in their role. Jester, Executioner and Serial Killer are the main neutrals in classic mode, but there are many more when playing in Custom mode. Any neutral is someone who doesn't pick a particular side. Executioners, for example, might have their target in the mafia but this doesn't mean they are on the Townies side.

List of Neutrals
Classic Mode Additional Neutrals (Only in Custom mode) For the full list of how they appear in game, here is a link to the Town of Salem Roles.
 * Jester: Aims to get themself lynched by any means neccessary and wins the game if they achieve this
 * Executioner: Tries to get another character lynched and wins the game if they achieve this. Turns into a jester if their target dies.
 * Serial Killer: Can choose one person to kill per night. They are immune at night and wins once everyone dies.
 * Arsonist: Can choose one person to be doused with gasoline. They can then set fire to doused targets. Aims to burn everyone.
 * Amnesiac: Doesn't know their role at the start but can choose a graveyard role (i.e. someone who has died). Role is revealed to everyone after selection.
 * Survivor: Can use a bulletproof vest 3 times to protect themself from attack, aims to survive till the end.
 * Witch: Chooses one person to control in the night. Can only 'control' them when they need to do something (such as for the Serial killer to kill someone, or investigator to watch someone). Aims to see the Town lose.

http://www.blankmediagames.com/roles/index.html