The element of destiny plays a significant role in shaping Tanjiro's path as a demon slayer in the anime "Demon Slayer: Kimetsu no Yaiba." Tanjiro's destiny is intertwined with his family's tragic fate and the emergence of his unique ability to empathize with demons. This destiny drives him to seek revenge for his family's death and to protect others from suffering a similar fate. As Tanjiro embraces his role as a demon slayer, his destiny propels him to face powerful foes, overcome personal challenges, and ultimately fulfill his purpose in the ongoing battle against demons.