ロー・アイアス 熾天覆う七つの円環
[b]Rho Aias: The Seven Rings that Cover the Fiery Heavens[/b] ([[Fate/Stay Night]]) / [b]Seven Rings of Heaven[/b] ([[Fate/Extra]] English localization).

A Conceptual Weapon stored in the Reality Marble [[Unlimited Blade Works_(Fate)|]] used by [[Archer_(Fate)|]] and [[Emiya Shirou]] in Fate/Stay Night's [[fate/unlimited_blade_works|Unlimited Blade Works]] and [[Heaven's Feel]] routes. Presented as a purple/pink [[energy shield]] composed of seven concentric circular/flower-petal-shaped layers arranged from smallest to largest, with the largest facing the user.

Each layer is as strong as a fortress wall, and the shield as a whole carries the "concept" of "blocking any projectile attack." The Conceptual Weapon is based on Telamonian Ajax's (Ajax the Greater's) shield, which consisted of seven cowhides over a layer of bronze; during the Trojan War (according to the Iliad), the shield blocked all attacks aimed at Ajax and his comrade Teucer without taking damage until it blocked [[Hector_(Fate)|]]'s spear, which pierced the first six layers before being stopped by the seventh. In the Unlimited Blade Works route, [[Cu Chulainn (Fate/Stay Night)|Lancer]] uses [[Gae Bolg (Fate)|]]'s thrown attack to the same effect in his second battle against Archer. [spoiler]During Shirou's battle against [[Gilgamesh_(Fate)|Gilgamesh]], Archer used Rho Aias to protect the former, and in the anime adaptation Shirou is shown using the shield during the battle.[/spoiler] Also, [spoiler]in the Heaven's Feel route, Shirou used the shield against [[Saber Alter]]'s [[Excalibur Morgan_(Fate)|]] in order to protect [[medusa_(fate)|Rider]].[/spoiler]
rho aias