
Sanji’s detached personality stems from his father, Vinsmoke Judge, a brilliant but ruthless scientist. While Sanji and his brothers were still in the womb, Judge conducted experiments on them, altering their genetic makeup. His goal was to create perfect soldiers – powerful, fearless, and capable of overcoming any opponent. He gave them incredibly durable exoskeletons and special abilities, but most importantly, he suppressed their emotions. Judge believed feelings would make them weak, and he wanted his children to be cold and efficient weapons, incapable of empathy while fighting.