Hello. You did not provide the story to which this question refers. This makes it impossible for this question to be answered and satisfactorily, but I will try to help you in the best possible way.
For Mr. Valentine to be established as a complex character, it is necessary that he be rewritten with a strong psychological charge. This character must be credible, but must present intense thoughts, ideas and actions, where it is necessary for the reader to reason about the construction and the meaning of this person for work, what he represents and what makes him be as he is.