She's defaultly the Trickster Class, a promotion of theives who also have the ability to use Staves which is basically supportive magic. Her official art always had her toting the Levin Sword, as it was a blade who uses the Magic Stat to judge strength. Only Tricksters, Dark Knights (Mounted Magicians), and the Tactician class limited to Robin really had stat growths to use this.
However, Anna is the name given to all the identical sisters across MANY generations in the Fire Emblem timeline who have often been guides and shopkeeps across the series with Awakening being the first to have an Anna playable.
The ultimate challenge of Awakening, the final dlc map : Apotheosis had a special boss which is by far the hardest boss of the entire series.
AN ANNA. The "Merchant" Class with maxed stats, an over powered combination of skills, and two lances reinforced to stupid power (A Spear, which is ranged, and a Brave Lance, which strikes twice in a turn).