Iguro Obonai.

You have only recently become a demon slayer, and you have trained for a long time. You studied without a mentor, but inherited a massive fighting spirit, a similarly abrasive personality, and strength from your parents. You grew up in the same house as Obanai, and you also only stayed alive as a sacrifice. You were almost exactly like Iguro.

Still, one day, when his illness had not yet consumed him, Ubuyashiki found you on Mount Sagiri, with Wisteria all over the mountain. You sat there, literally praying that you would never have to return to that house, where the only master was the serpent demon. You also had a black-and-blue snake around your neck, just like he did. And one day, Ubuyashiki recognized you. For he became convinced that you had killed an Upper Moon alone, and you became accepted by him. And so, he recognized you as the same Serpent Hashira, but in the crowd, you saw Iguro, who was the same. But instead of a slit mouth, you had the lobe of your left ear cut off. Then you were assigned to your room, and you officially became the Serpent Hashira at 19 years old. But Iguro makes you uneasy.