Unlock: Use Franklin, Complete Predator
Requirements:
Dive Bomber – Make a water landing without using the chute.
Sky Blazer: Perform 8 flips on the Blazer.
Keep following Dom on the Tarmac, making sure to go left to evade the jet. Head up the ramp. Maneuver the ATV to the back. Jump away the ATV and then parachute to land. For the requirement, stay riding the ATV as you jump and land it into the water, wheels going first.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art.