In the original release of Hyperdimension Neptunia, you were limited to the three “main” characters – Neptune, IF (Idea Factory) and Compa (Compile Heart) and the three console goddesses whilst Gust and Nippon Ichi Software America (Gust-chan and NISA-chan respectively) were recruited as guest characters that were not usable in battle without purchasing DLC content for somewhere around $2-3 each, which considering isn’t too costly. In Hyperdimension Neptunia Mk.2, both Gust and NISA become recruitable characters leaving Compile Heart without any DLC characters to include…. until now.
Two DLC characters have been made available. The first one, Cave-chan (Based off the game company Cave) is shown above using her “Bullet Hell” special attack, which I think is more then appropriate given their games. The second shown below is Famicom-chan (Who obviously represents Famicom console), who is summoning a dragon creature as one of her special skills – I am not to familiar with it, so not entirely sure the reference.