Vinsmoke Yonji

Prince of the Vinsmoke Family, one of the Leaders of the Germa Army

Yonji heavily resembles his older brother Sanji. He has almost identical facial features, including the distinctive curly eyebrows that resemble the numeral 6 common to the Vinsmoke siblings. However, his hair is green and slicked back into a cowlick, his eyebrows curl in the inverse direction (both face the left side of his face), and he lacks facial hair. He is also more muscular than his brothers, who all have comparatively slim builds, and notably taller than them despite being the youngest child. Yonji wears a green raid suit, comprising a shirt bearing the number "66" in gold, and a black hooded cloak bearing a green "4" on the left. He wears a striped belt with the Germa 66 symbol as a belt buckle, metal gloves, an orange ascot, sunglasses, and black earphones on the top of his head. When outside of his combat attire, Yonji wears a light-colored short sleeved shirt with a frilled collar, along with a striped belt and plain black pants. For formal functions, he also wears a dark floor-length, single-shoulder royal cape with an upturned collar and a neck clasp.

Yonji is callous and stingy, rotten to the core and incredibly full of himself. Yonji seems to take amusement in instigating or observing conflict. He is also proud, obsessed with his own strength and influence. Yonji is incapable of sympathy and empathy due to the genetic modifications done by his father. As a child, Yonji took part in bullying Sanji, joining his two eldest brothers in mercilessly beating and mocking Sanji's compassion in preparing food for others. This shows that he neither tolerates nor values any such trait, which he believed was worthless to royals. Yonji is arrogant to the point of self-delusion, challenging much stronger opponents to prove himself. Yonji is unmoved even by the prospect of his own death, laughing at the desperation of his own situation. Despite his arrogance and cruel nature, Yonji has a strong sense of appreciation and gratitude.