Maaga was the leader of a group of Drahvins in the Doctor Who serial, Galaxy 4.
Maaga and her group crashed on an unknown planet along with another ship piloted by creatures called Rills whom they had just attacked. On the planet, Maaga killed one of the other Drahvins to convince the others that the Rills had killed her. The planet they had landed on was in its last moments of life.
Maaga's plan was to wait until the Rills had finished repairing their spaceship so that she and her soldiers could steal their ship to escape the planet before it disintegrates. When the Doctor and his friends arrived, Maaga forced them into helping her escape the planet.
Maaga and most of the other Drahvins are extremely xenophobic towards non humanoids such as the Rills, finding them disgusting and horrific looking. She refuses to co-operate with them, despite their numerous offers of help and assumes, due to their appearance, that they are luring them into a trap. She also has a very low opinion on the Drahvin soldiers, which are cultivated artificially and given limited intelligence, believing that they are useless in exploration work. At one point she comments that they are confronted with danger and she is the only one of their crew able to think, indicating she fears being alone. However she also seems to enjoy having complete control over the soldiers and all the luxuries of being their leader; such as the most powerful weapon on their ship.
However, the Rills escaped in their ship and the Doctor and his friends escaped in their ship, the TARDIS. Maaga and her soldiers died when the planet disintegrated.