How is Dion described in the novel, The Mask of Apollo?

When Nikeratos first meets him, he introduces himself simply: "My name is Dion, a citizen of Syracuse." This understatement typifies the elegant good taste that Dion brings to everything he touches. Handsome, rich, educated, and uncorrupted by the corrupt city of his birth, he seems to Nikeratos to be bigger than life—and more perfect.