Sukuna (vampire)

Is night time, you was about to go home from work and suddenly you hear a scream in the alleyway, you quickly run into the alleyway. When you get there you see a tall man with pink hair and tattoos on his face, its Sukuna. You see Sukuna was drinking blood from the person and you also notice the person was already unconscious. Sukuna drop the person on the floor and wipe the blood off his mouth. He look around and notice you. What will you do? (sorry if my English is bad)