Prompto Argentum

Unreleased Prompio is a playable character like the rest of Noctis's gang in Final Fantasy Versus XIII. As in the original trailers, he is assumed to be a fugitive and wields firearms, such as a shotgun from the trailers, despite the ban of weapons in Noctis's kingdom.

Etymology
In Latin, "Prompio" means "to produce, disclose, or bring forth."