Sara will turn out to have a functional eye under her eyepatch.
And maybe it is a normal eye. She just wears the eyepatch to look cool and cute like Yoriko and Oki have said about Alice having to wear one.- Turns out she does have a right eye with... supernatural heterochromia, and wears the eyepatch for no stated reason. Presumably it is just for style.
Regarding Dinoponera's fate late on the story...
Dinoponera are a genus of ants that do not have a traditional queen caste. Instead, the females fight each other until one rises as an alpha ant, termed "gamergate". If the alpha dies, she can be replaced. They also happen to be one of those species where the male gets mutilated after copulation. Therefore, knowing this series' "logic" of having the characters do whatever their namesake bugs do, it's likely Dinoponera slaughtered the guys who raped her, resisted turning brainless and took over the Army Ant colony after Kuramoto got killed. This would explain how the zombies were able to destroy the country even though they seemed to become harmless when their queen died.- Not elaborated upon in either Arachnid or Caterpillar, but might be adressed in Blattodea where she already appears in chapter 1, which takes place some hours before the Arachnid Hunt.
- Chapter 2 confirms Dinoponera has been zombified, but she's still got a hint of life in her yet as she stumbles out of the school crying out for Chiyuri.
Yoriko is somehow related to the Organization.
Even if she honestly doesn't know about it. It could explain her lifestyle and why her father mysteriously went away.- It is revealed she is the true boss of the Organization — a 100 years old woman themed after Strepsiptera parasites (fun fact: an /a/non had correctly predicted her bug theme some chapters before) who is immune to poison and able to read minds. Also, that old guy was actually her adopted son, not her father.
The Kumoito is somehow related to the similar spider-shaped weapon Turis used in Jackals.
In Caterpillar, Kabutomushi's Hercules Horn is already offhandedly mentioned to be related to the Alligator blade used by the protagonist in that story. All of the "Insect"-assassins are actually mutants.
And the Organization itself probes the world in search for them in order to hog all of their mutations to themselves into an unstoppable killing force, granting them monikers in accordance to the "insects" their genetic traits resemble the most. They have no idea about this themselves.
- Characters like Megumi Oki and the Boss are explicity this, and on Oki's case she awakened her powers via a near-death situation as a child. In Choubu no Shinobi, she even has an identical ancestor with the same powers.
