Senran Kagura: Shinovi Versus has new free and paid DLC on the PlayStation Store today. This includes costumes, weapons, and new playable characters.
As far as playable characters go, Daidōji and a story dedicated to her are available for $3.99. Meanwhile, Rin, too, is available along with her own story for the same price. If you buy both together, you can get them for a lower $5.99.
The full list of DLC can be viewed here. At the moment, the DLC is only available in North America, but Xseed say it will be released in Europe tomorrow.