Celestian Insidiants are the fanatical witch slayers of the Adepta Sororitas. These battle-hardened zealots specialise in taking out psychic foes with their null maces. The Sister Superior has a choice of four heads, and the other members of the unit can each be assembled as a Warrior who wields a condemnor stakethrower in addition to their mace. There are also parts to alternatively build them as Kill Team specialists:

- Censor
- Abjuror
- Denuncia
- Reliquarius
- Mortisanctus
- Cremators