One the far left we have the mischievous Miss Dixie, lead vocalist for the group "The Singin' Strays" and in general one of the biggest divas you'll meet this side of the Mississippi!
On the far right we have Mrs. Kathleen, who goes by the name of Kate. (Or Kitten, if you know her well enough) She is one of the Western & Atlantic Railroad's board members, as well as part owner of the Nickles Sleeping & Palace Car Co. (She is actually a creation of myself and Kenoscope , although she has sort of fallen by the wayside in recent years. She appeared in a number of his Devil's Paw stories and I'm holding a place for her for the future. She is loosely based on Kate from Alpha & Omega...but as that franchise is dog-water, this is my take on her.)
And of course, I think we all know who it is in the middle. Everyone's favorite cocker locomotive engineer.