In Drakengard, you usually control the Red Dragon In Sky Missions. When you finish Chapter 13, you can unlock a Jet for Sky Missions by beating the Free Mission at Shinjuku. To use the the Jet On sky missions, go to the Dragon Select Menu, when you should normally see Red Dragon, Level 1,2,3 and then Chaos Dragon. Go Below the Chaos Dragon, where you should be a selection named; '??????.' Select it and then Manah's voice should be heard, then when you start the Mission, you'll be riding a Jet.