Disclaimer: I do not own Doctor Who. This is me playing in the BBC's sandbox.
Author's Note: I love imagining the trio of Theta Sigma, Ushas, and Koschei back when they were going to each other's birthday parties and not trying to kill each other. This is just a little moment at the Academy, extended from a drabble.
Ushas is the first of the trio to regenerate, thanks to an after-hours experiment gone wrong. It is so rare to lose a life in the Prydon Academy that the teachers allow her to go home to deal with post-regeneration sickness. Borusa is especially disappointed in her, and Theta thinks it's because the teachers had a bet over which would be first to lose a life.
When she steps out of the House of Redloom, he and Koschei share a look. It's hard to see Ushas in this new woman - where once there was copper skin and hair such a dark brown that it looked like burnished wood, that it will take time to get used to this new pale Ushas with yellow hair.
"You look lovely," Koschei says, all charm, as always. Theta nods.
"You're both horrid liars." Ushas grumbles, but smiles anyway.