Emilia's Lament is about Emilia and her lost brother. She recalled things about him before he disappeared. So it is structured as a myraid of flashbacks.
The rhetorical device that I would use to create a feeling of unity between myself and my audience is <span>first-person plural mode of address. So, using the pronoun <em>we </em>to talk about myself and the audience would be the best choice to form some kind of a closer relationship with them.</span>
Colloquial.
It's not quite informal since it uses more formal words, but it's not formal either.
