A rhetorical device is a form of language that employs a particular type of sentence, structure, sound or pattern intended to have an effect on it's audience, it is often used to persuade or to invoke a particular reaction.
Rhetorical devices are loosely organized in four main categories: Logos, Pathos, Ethos, Kairos.
Answer:
The rhetorical device used to create a feeling of unity between yourself and your audience is Pathos.
Pathos is a rhetorical device that is based on emotion. It convinces people with an argument drawn out through an emotional response and creates a connection between yourself and your audience.