Yes, despite being elusive to hackers and player alike, Anna has affirmed her role as an Outlaw and escaped from obscurity. If you’re lucky enough, you’ll find her on her map, simply titled Anna the Outlaw. The DLC for her single map will cost 250 Yen.
More information can be found on the official Nintendo.co.jp site here, though you may have to translate it. Fortunately, Serenes Forest has already taken on the task, and their efforts can be seen here.