The art of paper folding (ori = folding + gami = paper) seems quite fitting as a craft through which to master your homage to a Japanese manga. Itself culturally being so thoroughly linked with Japan.
Paper Kawaii's origami Death Notes are miniature affairs. Perfect for stringing together ornamentally, scattering about the home or presenting as Halloween Death Note gifts to friends. Not to mention making unique Trick or Treat tokens to hand out when folk come knocking at your door.
The larger of the two sizes demonstrated - in the Death Note origami tutorial - could be turned into a fandom photo album too. Preserve picture mementos for Halloween or whatever other time of year you choose to use it!
How to Recreate Death Notes in Origami
Like this adorable Pikachu origami 3D figure.
You can't believe how tempted I am to enquire whether she'd create an origami for Deontic. I know I'd give that a go! But how would I even explain what that might be? Any ideas, those of you who know what I'm talking about?