Hubris is defined as ‘exaggerated pride or self-confidence.’

According to Sage Journals: “In contrast to narcissism, which is a stable character trait, hubris is a personality change that emerges in response to combinations of personal dispositions, such as over-confidence, antecedents, such as prior successes and external stimuli, such as substantial and unfettered power; it ‘remits when power fades.’ Full piece

Article on the BFD about hubris in Her case.