Answer: Conscientiousness, Openness to experience
Explanation:
Conscientiousness is the trait in which people are thoughtful, follow their schedule,attentive towards goals and related tasks, etc.Person persisting high conscientiousness will be more goal oriented, behave in attentive and planned manner, preparing schedule etc.
Openness is the trait that makes person imaginative and experience different adventure and interest.A person low in openness will not like changes, new adventures, thoughts and other interests.
According to the question,Dilbert has high conscientiousness trait along with low openness as he is open towards changes, productive, works as per plane, open to thoughts and ideas, etc.