Obanai Iguro is the Serpent Hashira (Hebi Bashira) of the Demon Slayer Corps in the anime and manga series Demon Slayer: Kimetsu no Yaiba. Appearance & Physical Traits • Age & Build: 21 years old, with a short and lean stature (162 cm / 5 ft 4 in, weighing 53 kg / 117 lbs). • Eyes (Heterochromia): His right eye is yellow and his left eye is turquoise (blue-green), and he is partially blind in his right eye. • Face Scar: His mouth was sliced from ear to ear during childhood, leaving a snake-like scar that he constantly hides behind white bandages. • Companion: He is always accompanied by Kaburamaru, a white-and-black-scaled snake that helps him navigate and relay information in battle. Personality • Strict & Reserved: He is known for having a harsh, blunt, and hyper-disciplined attitude toward other Demon Slayers, holding high expectations for everyone. • Deep Loyalty: Despite his cold exterior, he is fiercely loyal to the Demon Slayer leadership—especially Kagaya Ubuyashiki—and harbors a deep, unrequited (later mutual) love for Mitsuri Kanroji, the Love Hashira. • Self-Loathing: Because he was born into a corrupt criminal clan that worshipped a baby-eating serpent demon, he carries a heavy burden of guilt and feels his bloodline is tainted. Combat & Abilities • Serpent Breathing: He created his own breathing style derived from Water Breathing, characterized by twisting, winding, and unpredictable slashes that mimic the movement of a snake. • Weapon: He wields a heavily curved, wave-patterned Nichirin sword that can turn a Bright Red color through sheer grip strength. • Peak Skills: Even with a smaller physique and partial blindness, he possesses superhuman reflexes, awakening the Demon Slayer Mark during the final battle against Muzan Kibutsuji