"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. It was also Charter who recruited Scout Harding into the Inquisition.
Dragon Age: Inquisition
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.
Dragon Age: Magekiller
Charter is dispatched to a small village to recruit the famous Mage assassin Marius for the Inquisition. Charter arrives just as the village is throwing a feast in celebration of Marius and Tessa Forsythia rescuing several villagers from Demons pouring from a nearby Fade rift. Finding Tessa alone in a tavern, after a tense confrontation, Charter formally offers Marius and Tessa a place among the Inquisition's ranks.At some point between Marius and Tessa's recruitment and their mission to the Hissing Wastes, Charter and Tessa enter a romantic relationship. When the two agents arrive to Skyhold too late to join the Inquisitor's assault on Arbor Wilds and witness Corypheus reopening the Breach over Haven, Charter sends them and Sutherland's company to clear a route for the Inquisitor's reinforcements. Before they leave, Charter takes Tessa aside and tells her she doesn't want her to die for Marius, that she wants her back safe.
When the Exalted Council is called by Divine Victoria at the Winter Palace, Charter is among the Inquisition presence in attendance. Charter monitors the activities around the Palace while guarding the Inquisitor's personal store of valuable equipment.
If Leliana did not become Divine Victoria...