The thoughts in it maybe, I'm not so certain about the need of the actual brain ITSELF sometimes..

[He has theories about this. And experiments planned, but they have to come AFTER he figures out this world's underpinnings and then gets back to his planned experiments with the darkness..

He has way too much to do and only one lifetime to do it in.

Being poked in the forehead jolts him out of that train of thought quickly, and he leeeaanns back just enough to prevent a possible second poke.]

That could just mean there's some sort of illusion around us. After all nobody's trying to walk through us or take our drinks, we're still 'here', we're just being ignored. Unlike what some would do to something invisible, or a spirit.

[Actually.]

Here, let's test that out. There's plenty of ordinary people here. If they can't see us at all, they shouldn't react in any way to us being here. But if we're simply disregarded..

[She should escape while she can. This sort of thing never ends well.]