The main cast were designed by Nomura and Naora, while side characters were handled by Nakaaki. The concept, which was set within the mythos of the Fabula Nova Crystallis subseries, was for a much darker scenario than other Final Fantasy games. Other major characters include Arecia Al-Rashia, head of the Rubrum Academy's magical department and a key figure in Orience's lore Cid Aulstyne, the leader of Milites Empire and the game's main antagonist and Joker and Tiz, two characters who observe the events of the games. A guest character is Kurasame Susaya, Class Zero's tutor and a veteran warrior. Alongside them are Machina Kunagiri and Rem Tokimiya, old friends who are assigned to Class Zero shortly after the events of the game begin. The main characters are the twelve members of Class Zero: Ace, Deuce, Trey, Cater, Cinque, Sice, Seven, Eight, Nine, Jack, Queen and King.

Their stories were created by Hajime Tabata, Hiroki Chiba and Sarah Obake. The world and characters were designed by Yusuke Naora, Yusaku Nakaaki and Tetsuya Nomura. The main character of Agito is a player-created cadet at the Rubrum magical academy. The story is told through two new members of Class Zero: Machina Kunagiri and Rem Tokimiya. The main protagonists are Class Zero, a group of students at the magical academy in Rubrum. Type-0 was re-released internationally in 2015 as a high-definition remaster for PlayStation 4 and Xbox One. An episodic companion game, Final Fantasy Agito, was released in 2014. Final Fantasy Type-0, an action role-playing game developed and published by Square Enix in 2011, revolves around a war between four nations in the world of Orience.

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