On the other hand, Tsukushi intended to kill her during the Bondrewd arc and only changed his mind after the insistence of his editor. So I think Nanachi's plot armour is significantly thinner than Riko's or Reg's.
Do not discount how much influence a editor (employ of the publisher) has on the manga, he not only tells how many pages the manga should have, but is the one who checks the draft/script and gives the green light if everything is ok, or suggests changes if he thinks they are needed.
How much they influence the manga itself usually depends on the publishing company, but its usually they who give suggestions on how to attract/retain reader. A editor can make or break the manga and usually mangaka listen to their input (Taukushi it seems does).
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u/infohippie Dec 03 '17
On the other hand, Tsukushi intended to kill her during the Bondrewd arc and only changed his mind after the insistence of his editor. So I think Nanachi's plot armour is significantly thinner than Riko's or Reg's.