OK wow, now I know it's been a little too long since I watched classic Who as I forgot that Nyssa's outfit was purple in tKoT and the following season, I always have her blue blazer outfit in mind but she wears that only towards the very end, in MU. LOL recency bias there. And I think I just remembered why as I've been listening to the Big Finish audio dramas and they feature Nyssa and the 5th Doctor a lot so the blue blazer features heavily in my imagination.
I think it might be my favorite one too as I like the deckchair look but it seemed off a bit which works in that she's not human. Same goes for the original purple outfit with fairy skirt, I thought the designers did a great job with that to look different but not too different. Though the later purple Victorian inspired riding top with ehm, pants was less interesting though Sarah Sutton carried it well. All were way better than Adric's jumpsuit thing. We don't talk about what wardrobe did to Tegan.
I love your equating characters in the story to SDV, especially Katura as older wiser Abby, that so fits! And there's no perfect hair for Luvic, he needs longer hair but not too long! Too bad you aren't doing multiplayer and someone else could play him.
OK I need to watch Keeper again, it's hard for me to make it there as I usually feel the need to watch from the beginning of Season 3 but need to wade through the 3 E-Space stories before which contain some elements I love but can be a little on the draggy side. I already have it open, e-space be damned!