- The immortals who awakened Nanase and marked Susan
- French immortals (and oh hey, I totally forgot that Tedd foreshadows the Magus retcons in this one, too)
- In Elliot's home
- A purely background appearance
- At Grace's Birthday Party #1
- At Grace's Birthday Party #2
- Another purely background appearance
- Confirmed as immortals who gave Susan and Nanase magic
- Criticizing Elliot's Magic awareness
- Meeting Susan and Nanase in France
- Another purely background appearance with really funky hair
- When last we saw "Helen" and "Demetrius"
Ashley wasn't there when Andrea the griffin told Elliot and Nanase there had been seven vampires, but information was clearly shared after that meeting even if it wasn't all on-panel. She knows there's been a vampire problem.
Ashley's not clued in to how immortals work anywhere NEAR enough to follow a lot of this, but mercifully, she's not asking for a lesson on how immortals work. At least, not on-panel.
I'm also not having Magus explain his falling out with Pandora right now. I'm keeping this bit of explanation as brief as possible, and even if it would be news to Ashley (and eventually Elliot and Ellen), it wouldn't be news to us. Besides, as eager as Magus obviously is to talk, he's probably not eager to talk about THAT particular moment.
Following Nanase
This will be addressed more properly in the inevitable next Q&A, but one reason Magus followed Nanase instead of just floating off wherever was because he wasted to be able to find his way back to Moperville. The plan was to follow her to, and back from, Paris.
There's also technical mumbo jumbo about how following a particular person allowed him to take advantage of plane flight instead of floating all the way across the pond and back, but again, inevitable Q&A.