Grandiose

This character has a grandiose personality.

An extreme case of narcissism. Grandiose characters have an unrealistic sense of superiority, a sustained view of oneself as better than others that causes the narcissist to view others with disdain or as inferior. It also refers to a sense of uniqueness, the belief that few others have in common with oneself and that one can only be understood by a few or very special people.