Personality. Obanai is a very harsh and strict individual who shows no concern for those who do not abide the Demon Slayer conduct. Obanai Iguro is a skilled warrior and member of the Pillars in the popular manga and anime series Demon Slayer: Kimetsu no Yaiba Obanai is a 21-year-old young man of short stature and a pale complexion. He has straight-edged black hair of varying lengths, the longest reaching down to his shoulders and the shortest stopping at his cheekbones.