Shikigami

From Inga no Kusari wiki

Shikigami is Dmitri Kengo Scheidzwer's glint.

It's normal 3 x 3 inch white cards with a black square drawn in the middle in a specially treated ink.

Glint Ability

Whoever focuses a bit of the spiritual pressure into the cards and presses their thumb into the middle of the black square, the cards will take the form of the person that was holding it, right down to the clothes they wear. They cannot invoke another person's special abilities besides the ability to see, hear, and sense spirits, but they retain every bit of information that the person would possess. Since they are made of spiritual energy, they do not possess vital organs like Dmitri, but they can be dissipated by attacks that would usually be lethal to the normal human being, returning to their card form. At most, Dmitri can carry five cards on his person.