An article on Tales of Zestiria reveals a few more characters.
The first is Jiiji (CV: Ichirou Nagai), the elder in Izuchi, village of Seraphim (known as Elysia in the English version--the village, I mean). The other is Maven (CV: Tomomichi Nishimura), a veteran explorer. As usual, the spellings are guesses, so they're probably wrong.
With the release of Tales of Hearts R, the first DLC set has been released. This time around are swimsuits which go for $2.49 each or can be bought in a bundle for $15.99.
Edit: Other prices are up now: £7.99/€9.99/$14.95 for the bundle or £1.69/€1.99/$2.95 for each individual costume.