Doctor WhoMark GatissDoctor Who: Past Doctor Adventures, book 49

Characters in Doctor Who

2 characters, main characters first.

Main characters

The Doctor (Doctor Who)
Also in Doctor Who, The Clockwise Man, The Monsters Inside, The Pictures of Emptiness, Doctor Who - The English Way of Death, Doctor Who, Doctor Who, Doctor Who, Doctor Who, Doctor Who - Endgame

Supporting characters

Ace
Also in Nightshade, Doctor Who