- Americans Hate Tingle: Audience reception for this series is far more negative in the west than in Japan, mainly because of Enju Aihara, the Little Sister Heroine theme involved in the series, and the massive amount of Darkness-Induced Audience Apathy of the series.
- Audience-Alienating Premise: Many viewers who watched the first episode got turned off with Enju's (a 10 year old girl) hitting on Rentaro (a 16-year-old teenage boy) with the notion of a Berserk-level grimdark Lolicon action series. The hopeless tone of the rest of the series doesn't help.
- Awesome Music: The opening, "black bullet", and the ending, "Tokohana".
- Base-Breaking Character: Away from the generally well established fan love for Tina, debates about Enju can send shockwaves around the forums. Some see her as an annoying, topic little sister character whose idealism contrasts stupidly with the world she lives in (not to mention her Precocious Crush towards Rentaro), while others consider her a solid character with a lovable personality which is also a pleasant divergence from the cynism and ambiguity of many main characters in recent anime (and that only increases her Woobie status once the series kicks off with it). However, most of them are unanimous in that she is quite adorable.
- Broken Base:
- The anime adaptation. Some claim it to be a good anime with strong political and philosophical messages and themes, along with well developed characters and action. Other find it to be either So Okay, It's Average or a dark shonen Attack on Titan ripoff catered to the lolicon fanbase. It's even more base breaking within the light novel readers, as some who read the light novel felt that the anime drastically changed many scenes or cut out a lot of content while others say that it stays true to the mood and theme of the light novels.
- In the light novels, The Fugitive Arch (volumes 5 and 6). The infamous NTR where the antagonist forced a marriage into Kisara and framed Rentaro for murder and put Enju and Tina to one of the worst suffering hell (such as implications that Enju suffered physical and emotional abuse and torture by "buddy killer") has caused a lot of controversy among viewers. Some said the Fugitive arch adds a lot of Tear Jerker drama and appropriately deconstructs Rentaro's utilitarian ethics. Others find this storyarch to be Facepalm worthy feeling that the storyarch was created just to piss the readers off.
- Darkness-Induced Audience Apathy: The setting is so very crapsack and the main characters are hopelessly ineffectual in stopping the Gastrea threat or the segregation against the cursed children, not to mention, the author's tendency of killing off a good number of characters (or at least put Rentaro and Enju through sadistic hell) before they receive sufficient Character Development, means people can simply get bored of the darkness. Detractors accuse the author for putting too emphasis on sadistic treatment of the characters while failing to clear up several plot points such as Enju's high corrosion rate. It doesn't help that the story appears to get worse at some point with moments such as the massacre of the cursed children school. Taken Up to Eleven with the Fugitive arc (volumes 5 and 6) where the author decides to put every main character in the worst possible suffering he can imagine. The group hating the cursed children seems so irredeemable while the heroes look so ineffective on the long term that there are fans who end up rooting for the Hiruko pair.
- Draco in Leather Pants: The Hiruko pair has gotten a few fan following and support. Kagetane for his opinions towards the government and his daughter, Kohina, for being as equally cute as the main young girl, Enju Aihara.
- Ensemble Dark Horse:
- Shougen Ikuma, despite being Killed Off for Real and his Dying Moment of Awesome, has garnered a large fanbase mainly because of his manly appearance. It also doesn't help to note that the manga adaptation makes a bit more of a likable character.
- Similarly, Shougen's Initiator, Kayo Senju, also received a big fan following as well.
- At least in the anime, Kagetane is extremely popular, sometimes moreso than the protagonists because of his entertaining personality and the fact that he's totally justified in believing that Humans Are Bastards.
- Kagetane's daughter, Kohina, isn't too far behind because of her being a Cute and Psycho Creepy Child.
- Escapist Character: Tina Sprout. Even among folks who hated this show, it's generally agreed that many want Tina as their little sister instead of Enju (especially in America). It also doesn't help to note that Tina's personality does not fit into the typical Japanese stereotype of an American.note
- Fan-Preferred Couple:
- Despite Rentaro and Kisara being an Official Couple, many folks at /a/ on 4chan prefer pairing Rentaro with Enju Aihara. This is mainly due to Enju's The Woobie status, her sweetheart personality, a cute young girl that fits perfectly with the Little Sister Heroine archetype, and a being one of the most lovable characters in the series. There are also those that don't like the Childhood Friend Romance because they think it is overused.
- Meanwhile in America, the Tina Sprout/Rentaro shipping is preferred more than the Rentaro/Enju AND Rentaro/Kisara pairing combined.
- Fandom Rivalry: Developed this with Attack on Titan note and No Game No Life note .
- Germans Love David Hasselhoff: Tina Sprout isn't seen as unpopular in Japan but just another character. In America, however, she has received a much larger fanbase than in Japan.
- Hilarious in Hindsight: Kinema Citrus animated the adaptation. Shortly after, they would make Under the Dog, which also exhibited numerous similarities with this.
- Nausea Fuel: ANY of the Gastrea transformations, in addition to being horrific.
- What Do You Mean, It's Not for Kids?: A very interesting case. Many fans think Black Bullet is a typical dark shonen action anime note . The series itself is seinen and the anime aired at Otaku O'Clock.
- What Do You Mean, It's Not Political?:
- The light novels have a lot of strong political overtones throughout the series. Namely, the status with the cursed children can easily compare to the Jim Crow segregation laws in the United States and to the apartheid government in South Africa. Should a small minority of young girls born with an incurable parasitic virus be treated as low lives in society and deserved to be lynched and murdered in public, or should they be treated as equals with normal humans? Are the cursed children by nature destined to be evil since they'll turn into Gastrea monsters anyway, or has the circumstances of society caused the cursed children into a life of poverty and crime? Are the cursed children the key to defeating the Gastrea and funding the cure to the virus? Can the cursed children and humanity alike can live together side by side in peace? Many of these points are explored throughout the novel. Seitenshi can be easily compared to Martin Luther King Jr. and Nelson Mandela for civil rights for the cursed children where she is a strong believer of pacifism and there can be nonviolent change in society to help the cursed children. Regardless, the political overtones in the light novel can be used to apply to modern Japanese society as well.
- Also, Black Bullet has a very strong left-leaning political view; as the main character, Rentaro, and Seitenshi want to reform society to grant civil rights to the cursed children and society to treat them with dignity and respect. The series has put a lot of emphasis and deconstructs Rentaro's utilitarianism while the antagonist are either named after libertarian philosophers such as Ayn Rand, or a secret Right-Wing Militia Fanatic organization wanting to reunite Japan under their ultranationalist fist and use genetically modified Gastrea to Take Over the World.
YMMV / Black Bullet