William Orville

ウィリアム=オルウェル (後方のアックア), Acqua of the Back,Flere210

Real name is William Orville. His Sorcery name is Flere210, "The one who changes the reason of tears". Blessed with the nature of "God's Power". He is the most physically fit compared to the other members of the group. He was formerly a mercenary for the Anglican church but converted to Catholicism and joined God's Right Seat. He is also the only one who does not ignore the opinions of the Pope and not corrupt like his fellow God's Right Seat members. Although he cannot use spells that are used by normal sorcerers, he is blessed with the spell "Divine Mother's Mercy", which nullifies the liabilities of certain special spells so that he could perform powerful spells under unfit conditions. He also has the capacity of a saint, so he is also endowed with super-human capabilities, carrying weapons twice as large as him. On top of that, "Divine Mother's Mercy" nullifies the Limiter of the body so that he could use 100% of said capabilities as a saint.

He fights against Kaori Kanzaki, who also has the capacity of a saint, and displayed a great gap between their power. After his defeat in hands of the Amakusa's and Tōma in the volume 16, where he loses the "Divine Mother's Mercy", he returns in volume 17 in England wielding a replica of the dragon slayer sword, Ascalon, during the Magic Civil War as an ally of Princess Villian and Necessarius and fights his former friend and comrade, the Grand Master of the Knights of England. Later he heads to Russia, in order to stop Fiamma plans, and in the way meets and saves Shiage Hamazura and Rikou Takitsubou from a group of mercenaries.