No. Long, curly hair; sort of had a Victorian style of clothing; seemed friendly enough? I don't think she was here long. A couple weeks? Maybe a month, max.
TBD. I have ideas but There've been other Derleths, and a lot of the same people at them? Like a version of ourselves existed in those alternate timelines, so maybe that has something to do with it? Or something they did, not it's just pulling in the nearest counterparts it can grab? Which might explain why even when people disappear, sometimes they show up again, but slightly different, with no memory of being here before.