Canoness Veridyan

Cannoness Veridyan and all friendly units with the Adepta Sororitas Faction that are within12" of her have the Precision Shots and Precision Strikes special rules.

If a model with the Martyrdom special rule is your Warlord, and that model is removed as a casualty during the battle, all friendly units wholly comprised of models with the Act of Faith special rule automatically pass all Leadership tests until the end of your next turn.

Models with the Shield of Faith special rule have a 6+ invulnerable save and the Adamantium Will special rule.

A unit with the Act of Faith special rule can attempt to use its Act of Faith immediately before it acts during a phase; i.e. immediately before the unit moves in the Movement phase, shoots (or runs) in the Shooting phase, or before any blows are stuck (either by friend or foe) in the Assault phase. To do so the unit must take a Leadership test. 

If the test is failed, nothing happens and that unit cannot attempt to use that Act of Faith again for the rest of the battle. If the test is passed, the Act of Faith is successful; unless stated otherwise, all models in the unit will immediately gain a special rule until the end of the current phase. The special rule gained will be listed in that unit's Act of Faith entry, along with which phase(s) the Act of Faith can be attempted in.

Unless stated otherwise, a unit can only attempt to use an Act of Faith once per game and a unit cannot attempt to use more than one Act of Faith in the same phase. A unit can only attempt to use an Act of Faith if it is entirely comprised of models with either the Act of Faith or War Hymns special rules.

Independent characters can join other units.  They cannot, however, join units that contain vehicles or Monstrous Creatures.  They can join other Independent Characters, though, to form a powerful multi-character unit!  Independent Characters pass Look Out, Sir rolls on a 2+. A unit that contains one or more Independent Characters does not need a double 1 to Regroup if reduced to below 25% of its starting numbres, but instead tests as if it had at least 25% remaining.

Full details in BRB. Rule too long to copy verbatim.

When a unit that contains at least one model with this special rule takes Morale checks or Pinning tests, they ignore any negative Leadership modifiers. If a unit is both Fearless and Stubborn, it uses the rules for Fearless instead.