Elite Grand Bell Reyvateils trained to support the Knights on their missions, these girls are even stronger than the experimental IPDs found in the IPD Labs, although they mostly prefer to attack physically and use their Song Magic just for support. Their skills are High Kick and Boost Echo, so it would be preferrable to defeat them first to keep them from increasing the damage output and critical hit chance for the enemies. Although the description states they can use healing abilities, fortunately they can't use Cheering Wave, which simplifies the battles against them a lot.