Niji has blue-colored hair and curly eyebrows. his distinctive curly eyebrows form a spiral that resemble the numeral 6. He has a similar build to his brother Ichiji, being slim with long legs and standing close to him in height. His hair is groomed into a large, curved partition across the right side of his face, ending in three spikes like most members of his family, Niji is proud of his royal status, looking down upon most he's very strong and lacks emotions.