Olivier Mira Armstrong

General Major Olivia Armstrong is Alex Louis Armstrong's older sister. She is in charge of Briggs, the northern military border. She scoffs at the concept of "equivalent exchange" and believes "survival to the fittest" is the only law in life. Her subordinates are loyal, but if it ensured the survival of Briggs, they would leave her to die if the need arised, and she wouldn't hold it against them. She can't stand Colonel Roy Mustang, and she is brutal towards her little brother. She considers both of them to be weak and insults to the military.

One of her closest surbordinates is Major Miles, a soldier whose grandfather was Ishbalan; he is of many bloods due to several inter-racial unions, beginning with his grandparents. It is possible that he is also part Xingese, but his Ishbalan blood is the most prominint.

Olivia assists Edward and Alphose after the homunculus Sloth inflitrates Briggs on accident. She helps them out because of personal reasons and her determination to protect Briggs, even if it is from the military itself. She thinks of Edward and Alphonse as whiny children.

Only one person has ever outsmarted Olivia before. Only Ed and Al know the identity of the person is: their teacher, Izumi.