TheWoWDBA reference to Mrs Norris, the Maine Coon cat familiar of Argus Filch from the Harry Potter series, you can find this cat, and [npc=109377] in the magical Nar'thalas Academy in central Azsuna.
Beast
Mr. Nors
Filrich's Cat
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Mr. Nors will occasionally walk a path from Filrich, down the hall, up and around the Academy entrance area and back. No need to follow him, as he doesn't go anywhere useful.
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Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
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Level and Map Tracking
The game data tunes Mr. Nors for levels 10 to 45, Legion content.