Final Fantasy Type-0 features many characters. Class Zero, which consists of Ace, Deuce, Trey, Cater, Cinque, Sice, Seven, Eight, Nine, Jack, Queen and King. There is also Ace and Machina, though they do not count towards the main cast.
Director Hajime Tabata, while speaking with Gan Gan Magazine, confirmed a thirteenth character that will be involved with the story somehow. He also confirmed that the average clear time for a first play through will clock at around 40 hours. Should you choose to play the game a second time, you will be treated with a different story involving Class Zero.
Final Fantasy Type-0 will also only have five summons total.