Charter is a spy in Leliana's network charged with reporting the goings-on of Crestwood.
"Charter" is said to be one of the last known of many aliases used by a famous elven spy for sale and master of false identities nicknamed The Black Hart, who was contacted by Leliana when seeking steady employment.
Along with being one of Leliana's spies, Charter is also a senior member of the Inquisition and the commanding officer of Caer Bronach.
Charter can first be encountered at Haven by the houses across from the inner gate where she is speaking with Scout Pellane. Later, Charter takes command of Caer Bronach in western Ferelden, near the Village of Crestwood.