SparkNotes does offer an analysis of major characters for Virgil's "The Aeneid." This includes only the most relevant characters to the plot; there is no analysis of minor characters on SparkNotes.
In addition to a character analysis, SparkNotes also has detailed background information about the author and the novel. There is also a plot overview and a list of all the characters in the story, including both minor and major personas and a brief description of each one. A section devoted entirely to important quotations is also present, as is a page describing the novel's themes, motifs, and symbols; a large percentage of the website is committed towards providing an in-depth summary and analysis.