"'He would have happily jumped into bed with her, enjoyed the pleasures of a lifetime and then... then he wouldn’t have woken up. He could have ended up like the eisiel, wondering the Earth looking for more hapless, idiot men to kill.'"

Eisiels are twisted, blackened creatures that prowl the world of The Fireblade Array. They are assassins with a single target who, upon dispatching their quarry, will kill themselves.

They are notoriously difficult to kill and have been rendered resistant to Blaze Energy. It is believed that they are the former lovers of wielders, burned and sent mad by the fires of the Blazes.