In a recent issue of Dengeki PlayStation, it was announced that two helpful NPCS characters, Odileia and Marion will now be available in DLC packs to use in your party.
Odileia is an Automata, or mechanical doll. She works in a library of alchemy where she’ll help Ayesha in finding books.
Marion was sent from a far-away land to investigate resources in the area and make records of ruins and so-forth. She becomes friends with main character Ayesha and will ask her to take part in her investigations.
Gust will be releasing more DLC for Atelier Ayesha; next time it will be a swimsuit extravaganza for our heroine, Ayesha and her would be protector Rinka(Linca). The next issue of Dengeki PlayStation will include a code for our trusty little witch Willbell, for her own swimsuit.
Source (http://www NULL.siliconera NULL.com/2012/08/08/upcoming-atelier-ayesha-dlc-makes-odileia-and-marion-playable-characters/)