Log from August 21st:
It’s driving me insane. Russ clearly knows what happened to my Mistress; why won’t he just come out and say so?
All I have is speculation, based on the magnet story.
I think the Red Cap stayed within her for years. Beyond puberty, even, until she became sexually active again. Maybe with another Red Cap; maybe just with another person.
It’s my only theory. I’m wondering if Katie was the very first Vessel to become one through those means.