With the bus back on solid ground, the passengers aren't at any further risk of danger, so you take off immediately after the shrouded figure you saw trying to escape. You catch him quickly, but he's already taken a hostage and is floating some fifty feet off the ground with her.
You fly up to meet him. He's wearing all black, with a flowing cape and dark cowl. You could mistake him for a cool anti-hero, but the hostage bit really seals the diagnosis: he's a super villain. "This madness stops here. But her down safely and turn yourself in."
"You think you can stop me?" he asks, mocking you.
"I will stop you," you reply.
He smirks. "Well, now's your chance; one of us is going up, and one is going down. Go ahead and catch me." The girl, who had been quietly whimpering, screams then, just as your foe releases her and flies up into the clouds alone.