Aerith and Bob: Range from Bob, Hassan, Alexei, Xiao Ming; to Phobos, Rothcol, Black★Rock Shooter; to MEFE, LLWO, and XNFE. There are some justifications about the alien's name, but have you ever met a guy named Rothcol?
It's revealed in chapter 2 that Rothcol is his last name and Phobos is a code name he prefers to go by.
Awesome, but Impractical: The ultimate Blade skill BB Genocide is mostly this. It boasts massively improved damage compared to its predecessor, the Iksa Blade, and also hits all enemies. However, it still only deals maximum damage to stunned enemies, the same quirk that Blade Kill and Iksa Blade had, and the only other skill that inflicts Stun is the Snipe skills, which only hit single enemies (and the stun wears off fairly quickly anyways). Combined with a cooldown time of three minutes in a game where most battles don't last half as long, it's more or less a glorified Hammer skill (also hits all enemies, but for normal damage) save for boss battles.
Back from the Brink: The trailer shows awakened B★RS fighting alien robot alongside human soldiers.
Renamed to Black Trike in the translation. Better than Piggy Ninja, at least. It's lampshaded too, since the mission is still named "Operation Piggy Ninja", and there's a dialogue option to be confused by the strange name.
Cool Plane: The Draco. Which is like a huge, carbon-steel composite stealth bomber.
Downer Ending: Oh sure, the world is saved from the aliens, but by that point it's pointless because humankind is extinct. And B★RS is doomed to spend the rest of her life alone. Mission Clear!
The ecosystem gets better, if the couple of polar bears is any indication.
It probably is. According to the events, it said that polar bears went extinct before the invasion, yet we find them here. Which could mean that BRS and the other humans were wrong about being the only ones left and there are probably more still out there.
Emotionless Girl: Even the Seven Apostles has more range of emotion than B★RS. And they are the bad guys.