It has me thinking it could do a good sepulcher knight. Forgive the colors as it has been ages since i used photoshop color replacement. My thinking is i can either directly splice a father knight, or try to make a mold of the shoulders and the head and do those directly.
It does wear pretty iconic Hakama pants, but other then that it's a gorgeous mini and you certainly can make up some cool argument/reasoning for it to work. Something like in the story of Shogun. Or maybe reverse: a Domaru signing up for Christ Almighty?
I'd say do it man! For the arms and head, I'd say the Father Knight might be your best bet (though the only one available outside of Icestorm is the Spitfire, but that is kind of the profile you want most of the time when using Sepulchers from my experience).