These are three ficlets I've written featuring Nyssa, a Doctor Who companion in the 1980s. Nyssa was young, aristocratic, very smart, and I think quite patient and resilient.
Body and Soul, rated G, 455 words
~ set after the 1983 Fifth Doctor serial Terminus
~ A discovery on Terminus changes winter to spring
Burning Bright, rated G, 400 words
~ Nyssa has seen eyes like these before, but not on this planet.
Kingdom's End, rated G, 628 words
~ set during the Big Finish audio "Circular Time" but should work if you haven't heard that
~ 'Is there a villain?'