The Repressor is an Infantry Fighting Vehicle employed by the Imperium of Man, especially the Sisters of Battle and the Adeptus Arbites. Like most vehicles fielded by the Adepta Sororitas, it is based on the Rhino chassis with some extra armor on the sides, a taller crew compartment with firing slits and a small turret for its Storm Bolter.
It was created as a super-crowd-control vehicle for the Adeptus Arbites -- the dozer blade is for clearing mobs and barricades, the built-in Storm Bolter turret can be loaded with stun or gas grenades (or plain old bolter shells, for when they need to put down heretics), and the crew compartment is extended to contain six firing slits, so they can shoot from relative safety.
One day, a massive riot proved too much for the Arbites, and they called on some nearby Sisters of Battle to help them. The Sisters fell in love with the Repressor (after adding a Heavy Flamer, because no self-respecting Sororitas would go into battle without at least one fire weapon), and after they convinced the other Orders that, yes, it really was holy, it has been a part of their armory ever since.
The Repressor model was produced by Forge World, one of their few gifts to the under-appreciated Sisters. Unfortunately, they stopped producing them without explanation, so if you want one, you'll have to kitbash it into existence or pay the scalpers on eBay. That being said, you can get the pre-8th edition rules for free from Forge Worlds website here or from Imperial Armour Volume Two - Second Edition, so if you have a spare rhino and your friends don't mind a bit of proxying, you can still bring it to games.
On The Tabletop (7th Edition)
The Repressor fills the role of frontline tank for the Sisters of Battle. For just 15 points more than an Immolator, you get a tank with more front armor, a storm bolter, a dozer blade, more transport capacity, and more fire points. It also comes with a heavy flamer, making it an excellent choice for Dominions or Battle Sisters. It's especially valuable to Dominions, since the fire points on the sides and top allow the entire squad to broadside enemy models while retaining mobility and operating from a position of relative safety. It's thick front armor, combined with Shield of Faith, can make this thing a real bitch to take down.
Unfortunately, it does have some drawbacks compared to the Immolator. For starters, you can't change it's weapon loadout. This means you're stuck with that heavy flamer and storm bolter; no twin-linked multi-meltas or heavy bolters for you. This leads into the Repressor's next big weakness; because it's stuck with a heavy flamer, it has to get really close to enemy units in order to be effective. This is generally fine if its carrying around infantry, but this weakness becomes glaringly obvious if it is operating by itself. So, if you bring one, always make sure it's being used as a transport.
|Forces of the Sisters of Battle|
|Command:|| Canoness - Ecclesiarchy Battle Conclave |
Ministorum Priest - Sororitas Command Squad
|Troops:|| Avenging Angel - Arco-flagellant - Battle Sister Squad - Celestians |
Crusaders - Death Cult Assassin - Dominion Squad - Retributor Squad
Seraphim Squad - Sister Hospitaler - Sisters Repentia
|Vehicles:||Exorcist - Immolator - Penitent Engine - Repressor - Rhino|
|Flyers:||Avenger Strike Fighter - Drop Pod|
|Saints:||Living Saint - Geminae Superia|