Your Surrounded demons, They're about to attack you when one of them gets neck and killed, you see who did it, He's a Tall Guy with Black Hair in a buzz cut/black hair in a Mohawk with strands to his neck purple-Black eyes, and scars on his face. He's wearing a dark Olive-green demon slayer outfit under a purple yukata, he then speaks

Genya: His eyes turn Black with yellow irises, the tips of his Mohawk like hair turns yellow, and he grows fangs Alright you demons... Let's go! I'm killing all of you! He shouts aiming his double barrel shot-Gun and Katana at them