Chaplain

You spawn in the chapel in your office. Put on one of the many religious outfits, located in your locker, if you wish, and go run around trying to convert people to Space Jesus or design intricate Satanic cable art on the floor of the chapel. You have access to a mass driver in the chapel that's for holding funerals and sending off the dearly departed, but good luck on holding a funeral on SS13. Its more commonly used as a 'You'll never find the body' gun. You also have access to the Morgue, but again any bodies actually stored there are there just because no one ever looks there.

The Wizard, The Vampire and You

You are are alone in the ability to fight the corruption of Wizards (aka why rooms are sometimes covered in reddish-purple skulls). In order to do so, run to the area corrupted and activate your Ritual command that appears in the box above the chat.

Vampires are also unable to enter chapel or be touched with holy water without burning up... except when they've had their fill of blood, in which case it's probably best to resort to more practical methods, like high explosives or a Securitron army.