[He knows. Huh, she didn't get the basics either? Guess she got too excited and didn't listen. Though before he can answer he sees her clothes change and smiles.]

That suit is a nice look. I'm guessing you're either Sherlock Holmes or a character from that book series.

[Likely not Nancy Drew.]

Anyway, essences are what allows us to exist here, as well as give powers most of the time. For example, since mine is Robin Hood, I can do this.

[He summons his bow and quiver.] It's hard for me to miss though I've been training to get better at fighting with it. I can show you later.

[He makes it disappear as well once he's done. Since they are still in town after all.]

It's not just storybook characters either. It can be gods, characters from novels and as was in Akechi's case, an old-school comic book character.