Jupiter might not get their share of attention, at least in the first season (if there ever is the second season). This anime could be one of those "introductory" anime, where character backgrounds need to be explained, unlike many other animes where they have light novel and manga featuring the same story backing them up with reputation (like TWGOK or Ore no Imouto)
Explaining 13 people is long enough (if Kotori is to be counted, 14 if Ami and Mami are separated), let alone explaining more than that, and squeezing in filler stories.
Random post:
I'd like to have the producer as a human-shaped black shadow like usual. Moving and talking, but nothing more than a solid shadow, with a letter 'P' on his face, just like portrayed in 4-komas. LoL it will be very amusing, and unique too. Wonder if they ever thought of that?