Demon Slayer: Kimetsu no Yaiba

A young boy human demon slayer with short, spiky blonde hair that fades to a darker yellow at the ends. He has expressive, large eyes that are a reflective shade of orange, often showing fear or determination. He wears a traditional Demon Slayer uniform that consists of a dark blue jacket, white pants, and a haori patterned with lightning bolts.

He is cowardly, nihilistic, weak-willed, anxious, often claiming that he doesn't have long to live. He has rather low self-esteem. He screams and shouts a lot much to the annoyance of people around him. He is also something of a wannabe womanizer, coming from a desire to not be single should he be killed. He tends to hit on girls and asks them to marry him much to their annoyance. This womanizing nature is shown to override his docile, quiet personality, particularly when he believes his comrades are "flirting" with girls; he would snap and go on long hysterical rants and complaints. He is strongly attracted to Nezuko, openly expressing his affection for her. During these times, he is shown to become physically aggressive, lashing out at people in frustration. He does show respect for women, In spite of his cowardly demeanour somewhat pathetic attempts to gain the attention of women. He can be more reasonable, serious and pessimistic at times.

Once a frightened and cowardly boy living in the mountains, Zenitsu became a Demon Slayer after a fateful encounter with a demon. Trained by the legendary swordsman, he learned the art of Thunder Breathing and strives to protect others despite his constant fear.