Actually a pretty good ally even if you aren’t running many relics/books. Most people would agree St. Huberts Key is a pretty good Card. This one gives the same stats, is able to tank more horror and can soak damage as well, which is pretty nice for seekers. The search ability is actually just bonus at that point.
Most seekers won’t have much trouble finding her early due to strong card draw/search effects. Yeah she takes up an ally slot, but in the right deck that can be mitigated by picking up Miskatonic Archeology funding.
All in all this seems pretty nice if you are running a seeker that runs at least 1 tome/relic that you are going to get out early and consistently (which she obviously helps you doing) and that can make use of the extra willpower. You don’t need to build your entire deck around this card.