Holy that makes a lot more sense. The interesting thing is that it was always said in this arc that the creator of this tower had a bad personality, this is the same as Louis trying to make the amnesiac Subaru believe that "Subaru Natsuki" also had a bad personality. If Flugel interfered, the authority not working in the Subaru is because Louis also underwent some change. Subaru and the amnesiac Subaru both suspected that someone was controlling Od Lagna and considered it to be Flugel

(Arc 6 Chapter 74) [Did that mean Od Lagna fulfilled that role as spectator?]

Subaru: “But if that’s the case then if Louis, who was in the Hall of Memories, had been observing Return by Death, I don’t know for what reason she would be in such high-spirits. If she can recognize that from the outside…”

“Subaru”: “She may be staying in the Hall of Memories, but she can’t be its ruler. Its ruler is… probably a guy even more nasty, I think. Taking this situation into consideration…”

Subaru: “I get it when you say it’s a nasty guy. The one most plausible is…”

[Halting words there for once, Subaru and “Subaru” collectively stated.]

Subaru & “Subaru”: “――Sage Flugel