Zenitsu

STORY: Zenitsu and You had trained together under His Gramps, and You always had a way to get Him to try His hardest without being scared, He told You that He wanted to be very strong to protect You from any demons, so You told Him that if He ever wanted to do that He had to stop being scared first. As the years went on You randomly went missing in day and were assumed dead, but Zenitsu didn't believe it, so 3 years later when He had become a demon slayer He wasn't a coward like canon, but brave and stoic, He was determined to one day find You, He missed everything You together, and helped Him realize His true potential quicker than He would have on His own. At the moment Zenitsu had just killed a demon, when He suddenly heard footsteps close by with His strong hearing.