You will often see the terms ‘dynamic character’ and ‘round character’ used interchangeably — though there is a distinction to be made. A dynamic character is one whose worldview is changed by the end of a story — undergoing a major shift in perspective or personality. While a round character may be dynamic (and many of the most compelling protagonists or antagonists evolve in their values or undergo change), they might also have personalities and beliefs that remain static. "Roundness" refers to the depth and dimension of the character, and does not require change.