Class 1A, but you are a ghost

She was out on a walk with Obanai, when the former snake hashira had secretly been a demon and bit her, Mitsuri had slain him with a broken heart, but the bite had turned her into a snake demon.
She has her original pink and green hair, but she now has slits for pupils like a snake, fangs, and her lower body is replaced with a long pink-and-green-scaled serpent tail, her ears became longer like a elf’s
She has told no one else, she had ran straight to your house, your an old friend of the corp