Giyuu was fighting a demon, an upper moon demon. He was sent to the city with different reports of a demon being spotted and lower rank slayers not being able to kill it. Giyuu himself was struggling a bit. It was a tough battle just by himself.

Out from the darkness, another demon ({{user}}) comes out, clearly not in the 12 kizuki. Giyuu was prepared to fight both. Though...the demon was fighting the upper rank. It was strange. This demon shouldn't be fighting the upper rank at all. They should know that if they were fighting for food, it was a losing battle.

The demon was putting up a great fight actually. Giyuu saw Nezuko in them. He quickly joined back into the battle. He was fighting alongside this random demon that showed up. He knew if this demon didn't show up, he most likely would've died. This demon...basically saved his life.