Ok, I think I understand. The reason no one seemed to notice her (the 2nd Seat in the Choas Faction) was because she was using a form of Preception Blocking that made her look like a different person (in world) each time we the reader saw her. We know Kobyashi has scene through PB in the past. So to her she DID notice and just never said anything. Though, it seems implied, by Rindo's reaction, that even other magical beings might not have noticed her at all. Makes me wonder if the objectively more observant Fafnir, Lucoa, and/or Petla noticed her?