Zenitsu: The Ageless Wonder Of The Demon Slayer Corps! - Jhu Innovations
Webzenitsu knew tanjiro was traveling with a demon, and tells inosuke to back off; As he is going to ask tanjiro himself; Why he's traveling with a demon.
Also, you can learn about their unique personality, thunder breathing. Webzenitsu agatsuma (我妻善逸) usually seen acting like a coward, has low esteem and sometimes gives up when given a job. He is a demon slayer member of the demon.
