I just watched the episode again, and I still think this is the best episode to date. Which is weird, because I always considered myself to be more drawn in by the Mecha-pr0n than the story and character development.
I have a question about the scene with the Eden Hydra. When Ranka sees Brera's cybernetic arm and has the flashback to the old Vajra attack, she says something like "Don't die, brother". Has it been established that she lost a brother in the attack, or was she referring to Brera?