Hayate no Ken: St. Claymore

is a Japanese light novel series written by Ryosuke Sakaki, with illustrations by Hashi Ishida. The series began publication on July 10, 1996 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
The main character, Leto, who closed the mercenary business and became the signboard girl of the mediator, returned to the battlefield and frontier world after the disappearance of his former partner, the mercenary Casals. During the journey, Leto meets a priest apprentice of the Fortuna sect. The Fortuna sect faces a crisis since its inception by Queen Brynhildr, who has the ambition to make the remote world his own. Can Leto save this pinch !? And whereabouts of former partner Casals? An adventure activity that draws with a touch unique to Ryosuke Sakaki, based on the pre-medieval West.