History Characters / ArachnidCaterpillarAssassins

* TrainingFromHell: Subjected Hanakamakiri to harsh training which just happened to involve regularly shoving a gordian worm-like device up his ass.

* ArtificialLimbs: After losing her right leg to Kabutomushi, she reappears a couple years later with an adjustable SeadogPegLeg. And a post-apocalyptic coat too, why not.

* GoingCommando: It is made obvious that Himekuwagata, isn't wearing panties, but when she becomes Hiratakuwagata a ChainmailBikini inexplicably shows up on her.

* TheCorrupter: He hoped for Hanakamakiri to turn into a sadistic assassin. When Hanakamakiri claims he'd like to turn Imomushi into a limbless sex slave, Kinohadakamakiri is pleasantly surprised by how he's capable of imagine that, even though it's an obvious lie.

* CallFoward: He fails to keep up with Paraponera and is told it was because of his own weakness, in a parallel to Dinoponera's backstory in ''Arachnid'' where she is abandoned by her father.

* MakeMeWannaShout: Can stun people by screaming at them, which the narrator compares to ants stridulating.

* PetTheDog: So far, his relationship with Dinoponera is mostly portrayed in a positive light. It is shown he didn't mind her being a fan of animes, as he named her Setsuna after a ''Sailor-Force'' character and rather morbidly gave a Moon Scepter toy to her that belonged to some kid of a family they were hired to murder.

* ChainmailBikini: When the dorcus girl turns into a curvy woman, her school uniform is torn apart to reveal she was wearing a {{Stripperiffic}} BDSM armor of straps. Even though the previous chapters [[GoingCommando suggested she had no underwear on.]]

* MsFanservice: When Ookuwagata grows into her voluptuous titanus form and rips her clothes off, [[MaleGaze no points for guessing how that is portrayed]]. She has a FanDisservice aspect to her, though, since not only she was a kid with no underwear (as implied by several obscured upskirt shots) just a few minutes before, that child self is still conscious on her head.

* ShamelessFanserviceGirl: She's more stoic than lascivious, but walks around naked and gives [[DeadlyHug deadly hugs]] to people with a smile. It's a kindness from the story that the girl is punished but not outright murdered for behaving like this, like what happened to the Army Ant Queen and Iroha in other installments of the series.

* DrivenToSuicide: He seemingly meant to disappear and commit suicide after reaching his peak as an assassin-mangaka, but [[CareerEndingInjury when his right arm became disabled]] he was actually still doing derivative works of his own series in secret. Ageha took advantage of Osamushi's frustration by convincing him to help her in exchange for regaining his youth and replacing his right arm with a wondrous shape-shifting weapon.

* DyingAsYourself: Mika is mortally wounded by Paraponera after revealing her true identity to Imomushi, and dies glad to see her sister was still wearing the hair decoration she once gave her.

* EvilMentor: Raised Hanakamakiri into a formidable assassin, but also frequently abused and raped the boy in order to make him as depreved as himself. Hanakamakiri was never quite brought into his influence, but is implied to have some measure of Stockholm Syndrome from the whole ordeal.

* EasilyForgiven: Downplayed. Kinohadakamakiri is shown to have terribly abused and raped Hanakamakiri after adopting him, to the point the boy has a nervous breakdown upon meeting him again during the Death Caterpillar game. Even so, Hanakamakiri has just enough Stockholm Syndrome and begruding respect for his master to only have claimed one of his eyes when they parted ways and acts polite around him while cooperating to let Imomushi find Ageha.

* ShamelessFanserviceGirl: She's more stoic than lascivious, and yet gives naked [[DeadlyHug deadly hugs]] to people with a smile.
* SpikeShooter: She was born with a condition that makes long spikes appear all over her body when she's emotional or threatened. It's essentially an anti-rape mechanism she has, turning her fight with Riock into a BrickJoke since it comes after he fought Ichijikukobachi, an unhinged rape victim who wanted to penetrate him with a drill.

* TheCorrupter: He hoped for Hanakamakiri to turn into a sadistic assassin. When Hanakamakiri claims he'd like to turn Imomushi into a limbless sex slave, Kinohadakamakiri is pleasantly surprised by how he can even imagine that, even though it's an obvious lie.

* EasilyForgiven: Downplayed. Kinohadakamakiri is shown to have terribly abused and raped Hanakamakiri after adopting him, to the point the boy has a nervous breakdown upon meeting him again during the Death Caterpillar game. Even so, Hanakamakiri has just enough Stockholm Syndrome, begruding respect and gratitude for his master's assassination teachings to only have claimed one of his eyes when they parted ways and acts polite around him while cooperating to let Imomushi find Ageha.

* EyepatchOfPower: Wears one over his right thanks to [[TheDogBitesBack Hanakamakiri stabbing his eye]] after graduation. And it just so happens that he's friends with a very busty lady, like Sara and Kuramoto from the main story.

* {{Expy}}: He's designed after Manga/BlackJack.

* ActionBomb: [[spoiler:His death causes a nuclear explosion that kills all the guests in the ship.]]

* GracefulLoser: Upon losing a clash of punches and being mortally wounded, Osamu acknowledges Shoichiro's strength and tells him to leave the ship before [[spoiler:his nuclear reactor explodes, actually bragging that he's victorious in how he's dying in service of the Organization. He dies alone but at peace, singing the ''Astro Boy'' opening theme and wishing Shoichiro well as his last words]].

* NoCelebritiesWereHarmed: Creator/OsamuTezuka must be spinning in his grave. Although Osamushi looks [[{{Bishonen}} quite different]] from how Tezuka portrayed himself in comics he does at least wear the characteristic beret hat.

* SuperpowerMeltdown: He's nuclear-powered [[spoiler:and eventually explodes into a mushroom cloud while singing the ''Astro Boy'' theme song, accomplishing the Organization's plan to erase all the V.I.P.s on the ''Ageha'' ship]].