神装都市の無刃聖機士
(しんそうとしのオーディン)

A light novel series written by Koyama Takeru, illustrated by [[artumph]].
The in-story term 無刃聖機士 is pronounced as Odin (オーディン), however it is also spelled as オーデイン (Ōdein) in the book for some reason.
shinsou toshi no odin