Regarding the lady in the plane, if she freaked out because of the energy of an undergrounder, we cannot ascertain who it was from whatever happened afterwards. First of all, that she consciously "saw something" is a stretch. Sometimes you meet someone quite normal, but you just feel uncomfortable for some unknown reason. It is possible that the woman had a freakout for reasons unknown to her where such expressions as "he's not real" were from her subconscious in a moment of panic, and whatever happened afterwards could be self-justification, or implanted suggestions. If I was an evil dude with psychic powers and someone freaks out because they're somehow sensitive, one way of diverting attention from me would be to make a telepathic/hypnotic suggestion that the problem is that unsuspecting person there and disappear. So, speculation in these murky territories can sometimes be misleading.
The interesting thing about these undergrounders and hybrids is that they look externally like ordinary humans. However, I don't think they are homogeneously distributed among the population. They wouldn't be hanging out in some remote rural villages in the middle of nowhere, but if they have missions and agendas, the most probable is to find them in key positions in the military, politics, academia, media, and the corporate world.
The interesting thing about these undergrounders and hybrids is that they look externally like ordinary humans. However, I don't think they are homogeneously distributed among the population. They wouldn't be hanging out in some remote rural villages in the middle of nowhere, but if they have missions and agendas, the most probable is to find them in key positions in the military, politics, academia, media, and the corporate world.