Well, the premise is great, in that slightly over the top way that makes me think of the manga club in Virgins' Empire. Fun so far, looking forward to more.
On the translators' note--I like the translation "memory holder". Sometimes using a slightly less familiar term jogs your mind to appreciate what it really means, where with something you know really well you just kind of gloss over the implications. Reminds me of something Tolkien used to do . . . not quite the same, but he would "rescue" old cliche sayings, by quoting older, more complete versions (or versions he made up that LOOKED like older, more complete versions) so your mind actually looked at what the old cliche was really saying, and you'd remember or realize the wisdom that got it repeated enough to become a cliche in the first place.