Knight of the Sword. The compatible Heroic Spirit naturally needs to possess legends as a knight of sword, as well as the highest levels of attributes in all but MGI. Class Abilities include Magic Resistance and Riding. Also, compatible Heroic Spirits usually excel in delivering powerful burst attacks.
Mounted soldier. Heroic Spirits who rode mounts (not limited to living creatures) qualify for this class. Although attributes tend to be lower compared to the Three Knight Classes, this is compensated by the abilities of the mount described in legend. Besides Magic Resistance, class abilities also include high Riding.
Mad Warrior. Heroes who have gone berserker during battle qualify for this class. Normally it is considered ideal if a Servant can wield power at the level of the original Heroic Spirit, but "Mad Enhancement" allows for the attribute enhancement of the Servant beyond the ability of the original at the cost of sanity. A class originally used to enhance weak Heroic Spirits.
