Ooh, am watching my way through Five right now, and while I expected to like Tegan a lot (having seen her in The Five Doctors where she's pretty good) I'm actually falling for Nyssa. So this is very timely. I haven't yet seen The Keeper of Traken and Logopolis, though I will soon, so I haven't met Tremas or seen her origin story. But the fact that I already know Ainley!Master has actually stolen Nyssa's father's body just makes every scene with him that much more chilling. :(

I can't wait to read your Nyssa & Nine story. That sounds amazing.