Eclipse5632 aka "Sensei Hanzo" has just finished translating the second audio drama track for the "Justice Rage" album. This track details Sumeragi's "Project Gunvolt" tests and their struggle to find a test subject compatible with the electric septima gene. It's a short track, but provides some interesting info, such as Nova's last name being "Tsukuyomi". Also, unless I'm completely off the mark here, I think "Takefutsu" (whom the scientists speak of) is revealed as the real name of the true final boss. It's crazy to hear in this track that Nova's compatibility with the gene was predicted to be even higher than the true final boss, though!
Anyway, in addition to translating this track, Eclipse also provides some intriguing translation notes in the description of the video, so check that out, as well!