James is a vain mixed traffic engine that won't let anyone forget it. He can occasionally be very rude to engines that he sees as less than him, but he does mean well. He used to have a prejudice towards most diesel engines, but this has significantly lessened over the years.
In "Munitions", although James was cranky and irritable, he listened to Edward's wise words on how to handle the situation. Later, when Arthur went to off to the rescue, Edward made James promise to look after him.
James and Gordon are good friends, but they can be very competitive! James also sometimes takes the Express to give Gordon a rest, something that the big blue engine has mixed feelings about. The two friends often banter, James trying to prove that he is strongest, fastest and best, while Gordon is secure in the knowledge that he himself is the best and has nothing to prove! calling James a "silly red engine with ideas above his station". This tends to leave the red engine feeling very annoyed indeed!
In "Logan Leaves his Mark", James constantly belittles and disparages Logan on the belief that he is only a little, insignificant shunter doing dirty and lowly work. Even when Logan warns him about the truck's trickery, James dismisses the little engine. Not long after however, James receives his comuppance for his rude words when his trucks push him off a bend in the line!