Great question. It never even crossed my mind to question that scene. Given what Tessa was throwing around later on, I wouldn't think that power is an issue but still...
Tessa probably has use of the Sight, but I'm not sure how effective a tactic it actually would have been in the aquarium. They had no idea what room Ivy was in, and it risks 'information overload' to use it for a room-by-room search. Plus Ivy probably would have changed plans from hide to throw her hardest punch by surprise if she saw anyone trying that.
In terms of questions, I'd like to nominate for consideration:
- Can blampires just go to sleep in a well-hidden coffin for a few decades to wait out a period of danger, and did any of the Elders try to get through the Stokerlypse like that?
- In the DV, historical authors like Shakespeare, Stoker and Lovecraft were "onto something". Are there any others?
- Since the event is for the Dog Men release, I suppose it's topical to ask what was up with those feds? They didn't seem especially bothered by a couple of wizards learning there are clued feds. So there's the (highly reclusive) Librarians and some other agency that's LTW has some familiarity with?
- What's the actual difference between a Fae ruler and a pagan god? The Fae still seem to depend on belief to some extent (hence Mab inspiring the Brothers Grimm and Walt Disney to keep faeries in human cultural mythology). Vadderung / Kringle is straddling the line, and the Erlking also seems to have aspects of some of the pagan hunt gods.
- In Fool Moon, Chauncey the demon told Harry the loup garou curse was "said to" have originally been cast by Saint Patrick. Supernaturally forcing an entire bloodline of people to become involuntary killers seems pretty out of alignment with Heaven's rules on free will. Was Chauncey repeating a false story as hearsay?
- In a previous Q&A about thresholds, Jim said the fetches actually hammered through the Carpenter threshold, making Harry mistaken in assuming they gained an invitation by shapeshifting into a trusted form. Putting together the Scarecrow's seemingly abnormally high resistance to iron with the subsequent information from Cold Days (Cat Sith's explanation of Fae law on thresholds, and that Nemesis releases its hosts from the binding rules of their nature), do we have sufficient basis to confirm the leading three fetches who entered the Carpenter house were N-fected?