Episode felt weird compared to the others, things seemed to go faster and jump around more than before giving the episode a more disjointed feel or it's just because they have to dump a bunch of information in one episode. The characters also come of as odd, Miyuki bragging without a care about Tatsuyas Cast Jamming that's so awesome it can change the balance of the whole world if people find out about it and then get all uneasy about other people learning what he can do... overall she's getting more annoying as the show goes on.
Don't really know much about the language but it feel like they have a pretty lame cover and that someone should at least suspect them to belong to one of the ten families. Anyway when they scrolled the name of those ten families each were numbered from one to ten. And just changing the four from yotsu to shi in their last name should at least garner one or two questions. Hmm considering the theme with four, that company Four Leaves Technology that made those guns Tatsuya uses probably belongs to Yotsuba, feels to much of a stress for it not to at this point.