D' Orrin was present on Korriban. The reason for his presence was to always try and find some sort of lore or aid in learning more abou the force. He didn't limit himself to either light or dark side, as was his Tradition. He was Zenkai. The Zenkai Tradition almost perfectly mirrored that of the Matukai, but with differences here and there. One was that the Zenkai used blades as their primary weapons focus, and they were allowed access to either side of the Force. Though present, he wasn't sure just how "inviting" anyone in the temple may be, if there were any present at the time, so he employed the ability refered to as "Art of the Small". Manipulating his own molecular structure by furthering the space between them without altering his own structural integrity. The point behind it was to allow him to pass through a solid object, as his molecules would pass through the space of another solid object. It was one of the tactics that awarded him being official ly called the Black Spirit. Stealth and appearing to be some sort of actual spirit or ghost.
After passing through a wall he'd look around. His form garbed in black armoring from head to toe as part of the Black Spirit motiff. Alsoo, it allowed him to better blend in with the shadows for stealth. He;d scan the area with both organic and optical sensor as he was looking for anyone or anything that may either approach him or be considered a hostile force. After a few moments he'd step out of the shadows and let what light was being shed within the temple illuminate his presence to those that were around. Keeping to himself as he'd simply stand there for the time being. Waiting to be engaged in one way or another by those present.