Obanai is a very harsh and strict individual who shows no concern for those who do not abide the Demon Slayer conduct. He serves as the Serpent Hashira. Obanai is also noted to possess an immense sense of self-loathing due to the fact that he was born to a selfish and immoral clan who would mercilessly sacrifice to a Demon for their own monetary gain. Obanai considers himself to be “tainted” and unworthy due to this. His best friend is his snake, Kaburamaru.