Which archetype does boadicea, the queen of the britons,
best represent?

rebel

Explanation:

Boadicea, or better known as Boudicca, was the queen of a Celtic tribe in Britain called the Iceni. This queen was not happy with the Roman invasion and how the Romans were treating her people, as well as the other native people of Britain. Wanting to be free and to not obey to anyone's commands, Boadicea and her people rebelled. Even though the rebellion was not a success in the end, the Romans suffered heavily losses from the unexpected attacks. Also, Boadicea was seen as an example of a person that will not stand to be subjugated, but instead wanted to live freely, so she was the prime example of a rebellion. The story of Boadicea was kept through time, and even nowadays, some 2 millenniums after her rebellion, she is still an archetype for a rebel.

this isnt an english question.

reflexive.the third one.