A new magazine scan reveals a total of SEVEN new characters available for the upcoming Tales of the World: Radiant Mythology 3, one of which is an original character similar to Mormo and Paneer of the previous titles and six from previous Tales titles.
The other character, Rox/Rocks (????, rokkusu), voiced by Hiroki Aiba, is a character quite similar to Mormo and Paneer from the previous titles.
The scan also mentions something about a new system called Radiant Drive, a feature which will allow the consecutive use of artes. More details on this when better scans are out.