How does gore fulfill traits

From the text:

"...Mr. Austin Gore, a man possessing, in an eminent degree, all those traits of character indispensable to what is called a first-rate overseer."

Mr. Gore was proud, ambitious, and persevering. He was artful, cruel, and obdurate. He was just the man for such a place, and it was just the place for such a man. It afforded scope for the full exercise of all his powers, and he seemed to be perfectly at home in it. He was one of those who could torture the slightest look, word, or gesture, on the part of the slave, into impudence, and would treat it accordingly.