Kenichiro Takaki, the well known producer of the Senran Kagura series, has been releasing information concerning the first character from Senran Kagura: New Wave G Burst to appear in one of the core games. Her name is Ayame and will be released as a downloadable character for Senran Kagura: Estival Versus for 600 Yen later this month.
You may recognize Ayame as the shop owner that appears in every version of Senran Kagura released so far. Ayame will not have a special story mode though she is described as an easy to use character with an orthodox fighting style who appears to use a mix of attacks taken from Katsuragi as well as her own moves. Currently Senran Kagura: Estival Versus is set to be released in the West by XSEED sometime this winter.