Niji

Appearance:

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Niji has blue-colored hair and curly eyebrows. Like all the Vinsmoke siblings, 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 very large, curved partition across the right side of his face, ending in three prominent spikes.

While commanding the forces of Germa 66, he wears a dark blue raid suit, including a black cape bearing a blue "2", dark goggles over his eyes, gold-colored gauntlets, and an aqua ascot around his neck. A set of horns extend upwards from his pair of orange and red earphones, and his belt bears a buckle with a prominent lightning bolt design. Outside of his raid suit, Niji wears a light-colored buttoned shirt with a tie, as well as dark pants belted with a slimmer version of the belt he wears with his Germa gear. For formal functions, he also wears a dark floor-length, single-shoulder royal cape with an upturned collar and a neck clasp.

(Credits to OnePiece.Fandom.Com)

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Personality:

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Like most members of his family, Niji is proud of his royal status, looking down upon and even abusing commoners and servants. He also expresses disgust at his brother Sanji's displays of kindness towards such individuals. Accustomed to wealth and luxury, he does not see the importance of food as Sanji does.

Since birth, Niji has lacked the ability to feel empathy and sympathy due to the genetic modifications done by his father. He had no qualms about inflicting pain on servants, as shown when he attacked the head chef and even sarcastically stated that he would have avoided her face if he had known that Sanji cared for her. He is outspoken and quick to anger, as he was easily provoked by Sanji's insults, and voiced his irritation at seeing that Sanji had failed to greet him and Ichiji upon their return to the Germa Kingdom. He has also exhibited petty and vindictive behaviors, as he was willing to throw a plate at an innocent chef's face simply because Sanji defended her. Furthermore, Niji's emotional detachment is so strong that he was unmoved by even the prospect of his own death, as well as that of his family. After realizing they had been tricked, Niji remained calm, saying simply that they set their sights too high before laughing at their quandary.

(Once again, credits to OnePiece.Fandom.Com)