Bill Potts

A student of The Doctor’s, Bill Potts had barrels of charisma and instant on-screen chemistry with Peter Capaldi’s Eleventh Doctor. She met a tragic end, being turned into a Mondasian Cyberman in World Enough and Time, before later being retconned to meeting a much more pleasant end when she was rescued by her inter-dimensional crush and resurrected to fly off on new adventures with her.