person of character; person of integrity
Refers to someone with a well-rounded, admirable personality, not just moral uprightness. Often used in formal or evaluative contexts.
He is knowledgeable, but above all, he is a person of character.
That teacher is truly a person of integrity and is loved by the students.
person with a dual personality
Compound of 人格 (personality, character) and 者 (person). The term likely emerged in modern Japanese to describe a person of well-rounded character.