The Madarai brothers are very tall young men with long, slender bodies, with a resemblance to a snake stretching upwards. They all have very pale skin, their faces resembling white masks. They all also have pitch-black hair dropping down to their shoulders. Contrary to his looks, Isshiki is a cautious and vigilant person, which are mentioned to be traits he was not born with, but ones that are necessary for his job.