A person's temperament or characteristic disposition; the typical tendencies of someone's character (often appears as the suffix ～かたぎ to describe occupational or habitual traits).
彼は職人気質で、細かいところまでこだわる。
He has an artisan temperament and cares about even the smallest details.
ストレスに弱い気質の人は、休息をとることが大切だ。
People with a temperament that is vulnerable to stress need to take breaks.
古風なかたぎを守る家族に育った。
I was raised in a family that preserved an old-fashioned outlook/temperament.