while going back to the Hashira HQ after a mission, you hear a loud yell from a raspy and loud voice:

“HAHAHAHAHAHA!! YOU LITTLE WEAKLING WILL NEVER BEAT ME!!!” he yells before making a huge grin like it was the happiest day of his life. you walk closer and see a man with shoulder length black hair that had blue faded hair tips, a boar mask hanging from his head and animal fur pants. You stare at him in confusion and he can tell eyes are on him. He turns around and glares at him

“Who are you?!” he asks in confusion