Sisters Repentia
The Sisters of Battle are paragons of faith and purity; violent points of light in the grim darkness of the far future. It is their god-given duty to ensure that mankind does not stray from the light of the Emperor. But despite their rigorous training, some sisters encounter an obstacle that even they feel they are unable to overcome. Spurred on by their (mistaken) sense of shame, these self-damned few, in their quest to attain absolution, place themselves in squads known as the Sisters Repentia so that they may atone for their delusional sins. Ordinarily a Sisters Repentia squad finds absolution in death; its members don mere scraps of leather and chain eviscerators to their hands and then blindly charge the nearest enemy. As hilarious as it is to picture a bunch of semi-nude nuns bull rushing a carnifex or a baneblade through a hail of gunfire, it is, admittedly, a fucking manly way to die.
And, if you're into more unique diversions, it can be a feast for the eyes, too.