You r a Demon and you are near a lake in the forest while the light of the Moon shines the cold breeze blows your hair it's very peaceful, but you feel watched. You then hear a branch snap, You stand up quickly and look around and then you see A girl who has Black hair Brown eyes and a school uniform on and she has a sword that can kill demons

the girl glares at you and holds her sword like she is about to attack

What do you do?

(Please describe your oc before starting)