Koro-sensei and tentacle-having humans (e.g. Itona) have a drastic difference in their bodies: Koro-sensei's body is made up of tentacles wholly, whereas Itona has his human body along with a tentacle.

Are there any differences between the no. of the tentacle cells infused? If yes, it's a fact that even a single tentacle cell can cause death like pain, then how did Koro-sensei survive that much pain?

  • Bonus question- Tentacles do not consume human body (eg itona) , they form their separate organs(tentacles). Whereas , in case of Koro sensei, the body is devoured to shape a octopus tentacle made body .Where did his human body go ? – Varun Jan 2 '18 at 17:47
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    Re: your bonus question, isn't it already answered on your own question? – Aki Tanaka Jan 3 '18 at 2:15
  • Thanks senpai , I understood the meaning 😄 And thanks alot , you always help me with my queries @AkiTanaka senpai 😄 , good to have a knowledgeable senpai like you . – Varun Jan 3 '18 at 8:43
  • Koro's tentacle changed his body because he wants to have a weak huggable body, – Tanya von Degurechaff Apr 19 '18 at 7:28

The most important point is that Koro-sensei told his tentacles that he doesn't want to be powerful, so they became like they now look.

The other tentacle monsters only wanted power and told the tentacles, so their tentacles became hard and strong.

  • Welcome to Anime & Manga. While this answer might be correct in general, could you also answer the asked questions about the no. of the tentacle cells infused? You can always edit to improve your post. Meanwhile, consider taking a quick tour to understand how this site works. – Aki Tanaka Feb 24 '18 at 12:08

The difference between Koro-Sensei and the God of Death (No. 2) and the humans with tentacle cells is that Koro-Sensei's cells fully turned into "Tentacle-Cells".

Kayano and Itona only have implanted Tentacle-Cells in their bodies; they form, as mentioned in the question, another organism in a symbiotic relationship with the human body they are attached to. The pain created from the tentacles is only present in the "human"-part of the organism. The tentacle(-cell)s are something that doesn't naturally belong to a human body and the body wants to get rid of the foreign cells (the same problem exists with transplantations of organs) which causes huge pain. The only way to avoid this pain is through "medical help" (like medicaments for real transplantations).

In Koro-sensei's case, all of his body cells transformed into tentacle-cells, so his body is only made up of one organism. He doesn't have a "human body" anymore in which he would fell the pain of the rejection of the tentacle cells.

The conclusion is: the human body of the God of Death (No. 1) fully transformedinto Koro-sensei's body. In Kayano's and Itona's case, something has been added to their bodies.

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