Sixth Sense wouldn't pick Rina up, but unless I misunderstand the attribute, Supersense would.  It specifically detects things invisible to normal sight, and I'd figure that would apply to extradimensional entities.<br/><br/>That said, ULTRA is one of the few entities able to locate Rina technologically, and even they have an effective delay.  Most of the world doesn't even know about extradimensional barriers.  Rina may come up as the occasional "glitch" on things specifically designed with Supersense the same way we have pictures of ghosts nowadays, but in the same way as nowadays, such images would be overlooked.<br/><br/>The way I see it, a Nephilim charged with guarding the world from demons would have some talents in watching through the barriers in order to catch "flitters" who hide just on the other side and peek through.  However, rereading Supersense, I'll agree that it's a little iffy, so Syene, if you don't want it to work on Supersense, we can talk with Sessha about some compromise in the way the attribute works.