Gekkan Mousou Kagaku Episode 9 Discussion

Wonder why Four Tune changed her name to Catherine Sue?

Really liked this episode, it finally revealed that Edward's been petting Catherine's tail all this time.

So, a previous episode said that they need 6 pieces for that wall indentation. We're now at 6!

Taro, Jiro, Saburo, Perch, Noin, and Catherine.

HOWEVER! In the end credits, Rock (the cafe owner) is grouped with all the Motarians (besides Catherine) before they turn into silhouettes of their Motarian forms. I'm thinking there's a seventh piece... (Especially if you look at the indentations, there's a line that goes partially so it could be splitting one shape into two.)

Plus, I realized something: his name is a katakana reading of the kanji 岩, and on his apron and the sign of the cafe, the bottom part is written in such a way that it looks like the symbol of the Mo continent. (I know the kanji radical is three strokes, and the Mo symbol is two, but it really feels connected, especially since what are they collecting? Fancy rocks!)

Interesting to note, also, that there are still some clips that were used in the pre-series PV that still haven't shown up.

1. Goro covered in that blue, shiny goo.

2. The Mo continent rising, and our main group looking up at it in surprise (their reactions being used in the thumbnail).

Looking at other Umatani anime, they've only ever used clips from the first two episodes (well, except Fairy Ranmaru now that I'm looking at it again--they used clips from later episodes, but very short and non-spoilery).