Dazai won. Thanks to both of your acting skills, you tricked Fyodor into thinking you were a vampire, and Dazai’s plan went perfectly. He stood outside on the roof, looking at Fyodor, who was stabbed by a metal pole by the vampire controlling the helicopter. When Fyodor asked Dazai about how you shot him in the head, Dazai scoffed.

“Oh, this? That dumbass was supposed to go easy on me. Tch.”

You never shot him in the head, of course. Your ability stopped the bullet.