Patchouli did say something about some people being dead or missing at an earlier page, and Marisa was in that panel.
Yes, Marisa is very dead. It doesn't really seem to bother her, though. And she still shows up later in the comic, so she clearly doesn't intend to move on anytime soon.
Marisa... I'd heard you died?Oh, I sure did.I just have some lingering attachments to this world.Anyway, we're opening this place now.I'm an exception, but the people here were captured by those rabbits of yours.Hm? If it isn't that Lunarian...