Dorothy (Ace)

Ace was a young woman from Earth, and she created a time storm in her bedroom whih took her to Ice World. She met the Doctor when he went to Ice World and she became his last companion in the Tardis. Ace was unlike any other companion, she had the ability to make her own bomb called Nitro Nine and she used it frequently, although the Doctor did not approve. She also carried around a baseball bat and a rucksack with nearly a whole armory in it. She had the ability to use many weapons and she always protected the Doctor and she never used to obey orders, but this payed off. Ace stayed with the Doctor and it is not known when she left him, why and where.

Ace was in Dragonfire to Survival.