- Acceptable Targets: Averted. The series takes on a very Black and Gray Morality with its approach to the shady world of international arms dealing.
- Anvilicious: "I'm seriously disgusted. People care more about wars than the future of their children," but subverted when she tells Jonah that the he needs to decide for himself whether she's telling the truth or whether it even matters to him. Also made less Anvilicious and more, well... weird when you take into account that this is Koko talking.
- Awesome Music: In season one, the opening song, "Borderland" by Mami Kawada and the endings, "Ambivalentidea" and "Shiroku Yawaraka na Hana" by Nagi Yanagi all definitely qualify.
- For season two, we get a new opening song, "UNDER/SHAFT" by Maon Kurosaki, and the return of Nagi Yanagi with "Laterality", the ending.
- The appropriately named track for this series from the original soundtrack, played during the first episode of the first anime season—and when Hex and her crew was finished off by a B-52 bombing. Enter: "Jormungand".
- "Sense of Crisis" from the Jormungand: Perfect Order OST gives the show a somewhat surreal feel with all the piano music.
- Perfect Order's first episode has an incredible French rap in "L'ambition mélodique".
- Broken Base: Fan opinion was split on the ending, with one side believing it was a No Ending that didn't really resolve anything, while the other side argues that it leaves future events open to interpretation. Others argue that the plan itself was a failure from the start and that the ending was a way of avoiding having to actually having to write it.
- Crazy Awesome: While not to the extent of Black Lagoon, many of the fight scenes and characters run on this. Can't shoot a bulletproof armored van while driving down the road at 60 miles an hour? No problem, just jump on the roof, jump across to their car, slip inside while they're reloading and slit all their throats. Anti-tank missile? Please. Throw it off course with a grenade explosion.
- Darkness-Induced Audience Apathy: The world is plagued by constant fighting and the main characters are a selfish weapons dealer with a plan to save the world that in reality, would kill more people then it would save, and her group of personal guns.
- Ear Worm: "Time to Rock and Roll" by Santa/Taku Iwasaki on the first OST, a catchy mix of rap, techno, and electronica that typically accompanies ass being kicked. Another song on the OST, "Time to Attack", has a harder beat and is the source of "Her name is Koko," which definitely also qualifies it.
- Ensemble Dark Horse: Despite having no named members, zero lines and a role that amounts to little more than a cameo. Seal Team 9, A.K.A "Night Nine", proved popular enough to crack the top twenty in a popularity poll.
- Evil Is Sexy: Hex. Come on now. Don't even deny it.
- Arguably Koko as well.
- They don't even compare to Valmet!
- Les Yay:
- Between Valmet and Koko, mostly from Valmet although Koko mentions that she somewhat reciprocates in an unguarded moment with Lehm.
- Valmet has Mildo, a Cute and Psycho mercenary who is obsessed with her but Valmet finds her annoying.
- Mildo also seems particularly close to Koko.
- A little bit between Koko and Schokolade given the way the latter blushes when Koko plays Personal Space Invader. On the whole, though, Schokolade comes off as more of a Cloud Cuckoo Lander than seriously attracted to Koko.
- Dr. Miami seems to also be attracted to Valmet calling her "eye candy" when it's suggested to Koko the team could use the hot spring at the Toy Factory they set up in Africa, she also comments that Baburin is surprisingly well endowed.
- Dr. Miami would also love to have her new bodyguard, Karen Low, such big breasts as Valmet for her to fondle, which she unfortunately hasn't.
- Magnificent Bitch: Koko Hekmatyar is a brilliant young Arms Dealer who runs her organization with ruthless efficiency. Constantly making advantageous illegal deals and dictating the course of conflicts, Koko adopts the young former child soldier Jonah as a way to keep herself shackled to her humanity, frequently taking on those who attempt to undermine or kill her while leading them to their own demises in breathtakingly impressive fashion. Koko is revealed to despise the arms trade despite her skill with it, and puts Project Jormungand into play: a plan to use a satellite system to seal the skies from humanity, destroying all aircrafts in the sky at once to force world peace, believing herself to be the one to create a true peace for the world, even successfully pushing Jonah into agreeing with the plan at the end, declaring her personal soldiers will be the final soldiers left.
- Memetic Mutation: "Her name is Koko. She is loco. I said Oh no!"
- Stoic Woobie: Jonah. The poor kid has been through hell, and continues to work as a child soldier, yet he rarely expresses any sign of unhappiness.
- Strawman Has a Point: Regardless of her methods, it's hard to disagree with Hex when she says that Koko is a threat, and the only way to stop her is to kill her, because she can't be tamed.
- What an Idiot! / You Have Outlived Your Usefulness: Karen does this when a Daxinghai subordinate panics and fires his assault rifle, revealing their position to Koko's team and spoiling her planned ambush. Karen walks up to him and shoots the mercenary in the head.
YMMV / Jormungand