Dudley Mafee was a former employee at Axe Capital and is a current employee at Taylor Mason Capital, later on known as Taylor Mason Carbon as the firm transfers to an ESG Investment Fund.
Although he is not as high of an earner as some of Axe Capital's other traders such as Bill Stearn, Mafee is a competent trader in his own right. He is the first to recognize Taylor's talent as an analyst and instead of having absolute belief in his trading abilities, he is shown to rely upon and value the opinions of his fellow peers.
Mafee is noted as being one of the kinder individuals at Axe Capital. He is widely regarded by most of his peers as one of the more emotional traders. Because of this, he is often the target of abuse by various other employees of Axe Capital such as Bill and Wags. Even Wendy takes advantage of Mafee's soft heart, when she abuses her knowledge of Mafee's love for her, manipulating him into signing a deal that would absolve her of any responsibility in the Ice Juice short.
In addition to his kind heartedness, he is also deeply loyal to his friends. It is revealed that he had given personal loans out to his childhood friends despite them ridiculing him for his wealth. He is the first person to befriend Taylor and recognize their analytical ability when they first come to the firm. When initially working as an analyst under Mafee, Taylor states to Wendy how most traders would have taken credit for their work, but Mafee gives credit to Taylor when he is successful on a big trade. During college, he shouldered the blame for a hazing incident caused by his fraternity, thereby accepting all of the blame, even though he was not apart it.