Arachnid Wiki
Japanese Name イモムシ
Rōmaji Name Imomushi
Code Name Imomushi (Caterpillar)
Age Young Adult
Gender Female
Hair Color Blonde
Eye Color Brown
Height 170cm
Weight 60kg
Family Mika Itou (Sister; deceased)
Occupation Assassin
Affiliation The Organization
Manga Debut Chapter 30
Image Gallery

Imomushi (イモムシ Imomushi) is a young carefree woman, who chose not to participate in the Arachnid Hunt. She's known to be acquaintances with Kumo, Riock and Amenbo.


Imomushi has short blonde hair (or brown-blonde hair) and wears two hairpins in the left side. Her eyes are dark brown. Her clothes' color scheme are black, grey, and white.


Imomushi is a carefree girl, who's something of a "big sister" to a few people in the organization. She is actually always serious in whatever she does.

She usually refuses to kill people who aren't her targets, but is willing to do so if they have a bounty on their heads.

Abilities and Powers[]

In the manner of a carnivorous caterpillar's way of attacking, Imomushi's shoes are able to nail her to the ground so she can swing back and forth to headbutt or punch her enemies. She calls this technique the Anchor Bolt Caterpillar Cannon (headbutt)/Bullet (punch).

Her strength is comparable to Kabutomushi's, such that even as a child she was able to pound heads into paste when enraged. She is also known as the "Adaptive Mutant" for her near immunity to poison and chemicals in general for reasons even she doesn't really understand.



Under the name Miki Inou, Imomushi used to live in an orphanage with her sister Mika. Miki was a tough delinquent and very protective of her sister, but found out the staff was heavily abusing the poor girl in exchange for not sending Miki away due to her behavior. Miki killed them in a rage, but was unable to save Mika from being choked to death.

The next thing she knew, Suzumebachi took her into the Organization as one of many recruit children and held her guilty for everything that had happened. She was then trained by the assassin Kagimushi and learned to keep her emotions in check so even as a killer-for-hire she'd become the kind of mature person Mika wanted her to be.



One year after the incident at the Ageha ship, Imomushi enters the Ouran School during the Arachnid Hunt to look for Suzumebachi. After meeting her allies Riokku and Amenbo, Imomushi comes across Alice and attempts to kill her for the prize money. She fails and leaves her be, before confronting Suzumebachi and questioning how much he knew about the first death of her sister being a lie.

Suzumebachi sets Dinoponera on Imomushi in response and backstabs her when she's unaware. This is a non-lethal wound, though, and Hanakamakiri shows up right after to take her out of there. Imomushi wakes up later that night when the sex zombie apocalypse is in full swing and finds that her partner has left her to parts unknown. While fighting off the zombies and looking for Hanakamakiri, Imomushi finds Alice and proposes a partnership with the spider girl.

Major Fights[]


  • Imomushi vs Paraponera (Win)
  • Imomushi vs Kumo (No Result)
  • Imomushi vs Riokku (Win)
  • Imomushi vs Sasori (Win)
  • Imomushi vs Unka (Win)
  • Imomushi vs Oki Megumi (No Result, Kabutomushi interrupts the fight)
  • Imomushi vs Kabutomushi (No Result)
  • Imomushi vs Sasori (Win)
  • Imomushi vs Paraponera (Loss, but Paraponera dies from his wounds before he can kill her)
  • Imomushi vs Hanakamakiri (No Result, stopped because she saw how well endowed he is.)



  • She is the main character of the spin-off, Caterpillar.
  • It is revealed by Suzume Bachi that Imomushi wasn't related to her sister by blood.
  • Imomushi's real name is Miki Inou.
  • In early drafts for Caterpillar's story, Imomushi was a male assassin.
  • Attempted to rape her trap partner Hanakamakiri after knocking him out, stopped because she saw how well endowed he is.