* AngstWhatAngst: Koji seems pretty cheerful despite what happened to him in the cemetery story.
* CreepyCute: The Morback species, the most notable member being Sers. They're a race of anthropomorphic bat-like aliens that have terrifying [[SlasherSmile Slasher Smiles]], [[BloodKnight are known for their hunting skills]], their mating rituals [[DeathbySex could kill a person]], and [[ArsonMurderandJaywalking normally take a career in the medical field]]. However they also [[FullFrontalAssault hate wearing clothes]], can look cute when they aren't giving a SlasherSmile, and [[AffablyEvil can be very friendly if you aren't their prey]].
* DarknessInducedAudienceApathy: A lot of the middle-to-later arcs can get pretty dark, paired with how some of the characters can get TooDumbToLive caused it to start to become more obscure as it went along.
* EnsembleDarkhorse: A lot of them but Koji, Juu, Ruri, Ashido and Chovek stand out.
** The Nikitak are an entire species of them, especially with the furry community, with Ro being the best example. There's more Nikitak-based merchandise than any other species, Nikitaks were the only species to get plush toys made of them, Ro has the most merchandise out of all of the major characters, and (if you go on the artist's main art accounts) there's far more art that involves Nikitaks and Nikitak fan characters than any other species.
* MemeticMutation: OBNOXIOUS GREEN CAR.
* {{Misaimed Fandom}} - Certain readers regarding Soshika's racism against humans as an admirable trait. Largely resolved by direct intervention from the creator. [[http://inhuman-comic.com/payattention.php]].
** A great majority of the fans like the comic more for the Nikitak species than the comic itself.
* TheWoobie - Kyo, and to a certain extent Ashido and Jet.
** JerkassWoobie: Soshika, when you think about how racist she is to humans.