Master

The Master
Missy
Harold Saxon

Time Lord

Gallifrey

Marnal (Father)

Lucy Saxon (Wife)

Renegade Time Lord, power-hungry "lover of chaos"
Fled the Time War, turned himself into a human using a Chameleon Arch;
Personality was reawakened by Martha Jones, regenerated into a younger body
Returned to Gallifrey, destroying the entire civilization
challenged the Toymaker to a game, lost & was imprisoned in gold tooth

Roger Delgado (Classic Doctor Who)
Anthony Ainley (Classic Doctor Who)
Eric Roberts (Doctor Who TV Movie)
John Simm (Modern Doctor Who)
Michelle Gomez (Modern Doctor Who)
Sacha Dhawan (Modern Doctor Who)