Kai rolled his eyes, "Hei, you aren't listening.
It's not about accessibility, it's about the fact that that thing was controlling the priest from a different room, in impenetrable darkness, and was able to see. It must be useing some other sense to see with. Telepathy, maybe? Something that no matter how good at hiding you are it'll still 'see' because you'll still be there. When I'm etheral I'm not actually in the room. It's... complicated. I'm not patronising you. If this was an ordinary surveillance mission then you'd be more use than me. But you weren't there, Hei. You didn't feel it, didn't see the way that priest was controlled. You didn't feel the monolith."(faceless...rotting) "I'm not being condecending, I'm being cautious." He smiled weakly, "Ninja you know. Caution is an occupational hazard."
After a second, he nodded. "Okay. Hei and I will go in through the animal doors and check if the coast is clear. Then Hei- you don't have a daily limit on your talents do you? I'm wary of running out of ki- or I can come and let you in." He hesitated, then nodded to himself."Okay Hei, you won't be able to sense me or knwo where I am, but when/if the coast is clear I'll rematerialise."
With that he went etheral and went through the animal doors.