Characteristics of people who don't get stressed at work

Rank is Assistant Manager or higher
Work is incredibly fast and efficient
Goes their own way regardless of interpersonal relationships
(But takes good care of their own people)
Has a fiery personality, so if you mess with them, they hit back
No one at work dares to touch them
And they probably don't have anything to stress about
In a way, it's an enviable personality
※This is limited to people around me