It is said that he was taciturn, possessed an air of dignity, and was a calm theorist, therefore few people could put forth their own opinions to his face.
寡黙であり、他を圧倒する威厳を持ち、かつ冷静な理論家でもあったため、面と向かって大久保に意見できる人間は少なかったと言う。