Character Themes are a powerful tool in customizing characters in D&D 4th Edition, a theme is a modification to a character that is best described as a cross between a race and a character class. They provide additional flavor, skill choices, features, and feat choices, to a character. You may choose a theme at any point in character creation and beyond (so long as you meet any prerequisites). If you choose a theme, it is not permanent, and you can retrain it. Below is a list of character themes, arranged by source.