Answer: Narcissistic personality disorder
Step-by-step explanation:
Narcissistic personality disorder is a type of Cluster B disorder which is characterized by a person believing that they are more important or special than others, an arrogant behaviour, envying others or believing they are better that others, expecting favors and advantages unreasonably and sometimes taking advantages of others, fantasising about success, power and attractiveness, failing to recognize the needs and feelings of others.
Most of these characteristics are classical examples of Calums personality.