Sonya Khan

Sonya Khan was Yasmin Khan's sister. (TV: Arachnids in the UK)

Whilst on a boat on a lake on Desolation with the Thirteenth Doctor, Ryan Sinclair, Graham O'Brien, Angstrom and Epzo, Yasmin Khan mentioned how her sister wanted her to move out of their house so she could have Yasmin's room. (TV: The Ghost Monument)