Sarafan Crusaders were an enemy class that featured inLegacy of Kain: Defiance. They were the lowest ranked of the Sarafan classes seen in Defiance and were seen predominantly in Kain's early chapters at the Sarafan Stronghold and the Pillars .
The Crusaders wielded a two-handed polearm and wore a uniform that had a metallic looking armor with purple clothing underneath, (of a similar shade to the Sarafan Archers - from whom they could be distinguished by weapons and attack style). The crusaders were faithful rank-and-file soldiers with little training who were hence a lower priority in combat than their 'more annoying' brethren (the ranged attacking Archers, charging Zealots and skilled Templars). Crusaders aspired to reach the higher ranks of Templar orInquisitor, but relative lack of skill meant they were ordinarily 'teamed' with the better ranks to attack and overwhelm Kain.
Much of Kain's Defiance journey in Nosgoth's early history actually takes place some years after the conclusion of Soul Reaver 2 (hence a new Malek statue in the Sarafan Stronghold Coutryard), it is therefore possible that the 'Crusader' rank was created in interim.
Prima's Official Legacy of Kain: Defiance Guide