Doctor Who: Every NuWho Companion Ranked From Worst To Best
7. Bill Potts
Bill was something of a refreshing break from the characters that had filled the companion role before, even if some of the writing on her season left a little to be desired.
There was no hint of anything more than a friendship between Bill and The Doctor, which often makes for the best Doctor-companion dynamics. She is both confident and caring, taking guidance from the Time Lord and unafraid to call him out when needed. She does in fact shoot him when the situation called for it, which is always good.
Her fate is both sad and potentially uplifting. Her conversion into a Mondasian Cyberman (that bloody Master) may have been sudden and left field, but her departure to explore the universe offered hope for this fun companion.
The twist in Twice Upon A Time was a nice coda on her story, retiring The Twelfth Doctor's tenure with grace.