Koyanagi Rou is a Japanese VTuber affiliated with Nijisanji and a member of the unit "Dytica." Despite his appearance as a laidback white wolf, Rou is a ruthless swordsman who cuts through demons and spirits. However, he also possesses a lazy personality and enjoys spending his days off playing with his cat. While he may appear easygoing, Rou secretly leads a certain assassination group, adding an intriguing layer to his character. Since his debut in April 2023, Rou has been captivating audiences with his unique blend of laidback charm and deadly skills, making him a rising star in the world of virtual influencers and VTubers.