User blog comment:Xilinoc/Ch. 554 - Desperate Lights/@comment-1387259-20131023150012

Well, given Bambietta's comments leading up to her outburst, looks like we can assume that she's very closely knitted with those other four (Liltotto, Giselle, Candice, Meninas), besides just being fellow Sternritter. It's possible they're some kind of designated sub-group, or a self-established conglomerate, maybe pointing to the hint that their assorted abilities work extremely well together.