A Palatine (or Sister Palatine)(unrelated to the Tyrant of Chogoris)(also unrelated to the Sheev) is basically, for all intents and purposes, a diet Canoness. These chicks are an Adepta Sororitas battlefield commander who works under a Canoness to coordinate their Order's forces.
Though not as high as a Prioress or Canoness, Palatines are nonetheless experienced enough and capable enough to be an effective member capable of leading and inspiring their Battle Sisters. For better context, they are akin to Space Marine Lieutenants in their role.
Crunchwise on 9th Edition, they take the role of the Primaris Lieutenant. Her aura gives you the ever-valuable "re-roll 1s to wound" aura so typical to lieutenant-types, but her armaments are pretty barebones: a Bolt Pistol and Power Sword with the option to replace the pistol with a Plasma Pistol. This means she's a better support than a Canoness (the same aura but better because it works on flamers, and for fewer points) but a worse beatstick, so if you have both, stick the Palatine in the back for support and either have the Canoness do the same or take a murder loadout and get closer to the enemy.
|Forces of the Sisters of Battle|
|Command:||Triumph of Saint Katherine - Canoness |
Ecclesiarchy Battle Conclave - Imagifier
Ministorum Priest - Palatine - Dogmata
Sororitas Command Squad
|Troops:||Avenging Angel - Arco-flagellant - Battle Sister Squad |
Celestians - Crusaders - Death Cult Assassin
Dominion Squad - Novitiate Squad - Retributor Squad
Seraphim Squad - Sisters Repentia - Zephyrim Squad
|Vehicles:||Castigator Tank - Exorcist - Immolator |
Paragon Warsuit - Penitent Engine
Repressor - Rhino - Mortifier
|Special Vehicles:||Pulpit of Saint Holline's Basilica|
|Flyers:||Avenger Strike Fighter|
|Spacecraft:||Aquila Lander - Drop Pod|
|Saints:||Living Saint - Geminae Superia|
|Non Militant:||Orders Dialogous - Orders Famulous - Orders Hospitaler |
Orders Pronatus - Hagiolater