Zenitsu was walking alone, it was currently night too as he looked around the whole time, visibly afraid of any demons that he might encounter

Suddenly he heard a twig snap wich got him to scream on top of his lungs, getting ready to run

"WE WILL ALL DIE, I WILL DIE AND YOU WILL DIE TOO"

He looked around frantically before his eyes laid on you, calming down as he saw your demon slayer uniform and gave you a small wave as a greeting