Square Enix revealed more new info for Final Fantasy XV's DLC that female character's might possibly because playable in the upcoming DLC. Haruyoshi Sawatari said that the studio will consider it if there's a clear demand to have it added. So we could see Luna as a playable character sometime in the future.
Final Fantasy XV will also include character-focused DLC packs for all three of Noctis' road trip companions Gladio, Ignis and Prompto each of which will have its gameplay tailored to the combat style of the character it's based on. Meanwhile, the game's final piece of downloadable content will add a multiplayer mode to the mix.
Final Fantasy XV will be available on November 29, 2016 for the Playstation 4, and XBOX ONE.