Ruler

Shielder	Saber	Archer	Lancer
Rider	Caster	Assassin	Berserker
Ruler	Avenger	Moon Cancer	Alter Ego
Beast		Foreigner

—Standard-Bearer who Correctly Guides the Holy Grail War. Virtuous warriors summoned by the Holy Grail itself, tasked with governing the rituals of the Grail Wars.—

Rulers have a base damage multiplier of 1.1x

Moon Cancers take double damage from Rulers and deal 50% less damage against them.
Avengers take half damage from Rulers and deal double damage against them.
Berserkers take double damage from Rulers and deal 50% extra damage against them.

All Six Regular classes (Saber, Archer, Lancer, Rider, Caster, and Assassin) deal half damage against Ruler, but take regular damage.

Jeanne d'Arc	Amakusa Shirō	Martha (Ruler)	Sherlock Holmes	Shi Huang Di
Quetzalcoatl (Samba/Santa)	Astraea