During the confrontation with the Port Mafia, Kunikida often uses his notebook pages to create tools like wire guns or flashbangs to assist in the fight against Ryunosuke Akutagawa and Ichiyo Higuchi. Plot Context

Kunikida possesses an ability called (or Doppo Ginkaku ). In this episode, you see him utilize the paper from his notebook to manifest physical objects:

While a single "Page" from a powerful supernatural book is a massive plot point later in the series (Season 3 and beyond), it is not the focus of Episode 3.

Some questions I have about Kunikida's and Yosano's abilities

He cannot create anything larger than the size of the notebook.

Kunikida writes the name of an object in his "Ideals" notebook, tears out the page, and the paper transforms into that specific item.

In this episode, the Armed Detective Agency falls into a trap set by Higuchi, who poses as a client. The "paper" (Kunikida's notebook) is his primary weapon when he and Tanizaki attempt to rescue Atsushi after the trap is sprung. Other Potential References

The agency often reviews paper documents and police reports during their detective work, though these are mundane items compared to Kunikida's ability.