Also known as: 後方のアックア, Kōhō_no_Akkua, William_Orwell, ウィリアム=オルウェル, Wiriamu_Oruweru
Acqua of the Back, real name William Orwell, is a character introduced in Toaru Majutsu No Index. A strong and willful man, he is a mercenary of renown in England, and originally a Saint of terrific power. He was a member of God'S Right Seat, and is one of the few characters who easily defeated Kamijou Touma in combat.