Well, as a Long Runner series that indeed has Loads and Loads of Characters, it would be really nice to have at least some sort of guide about them. Fortunately, David Weber kindly broke his characters into several distinctive Cast Herds.
Spoilers are unmarked.
- Honor Harrington - Manticore: The Star Kingdom (later Empire) of Manticore, the Talbott Cluster, and the treecats of Sphinx.
- Honor Harrington - Manticoran Allies: Manticore's allies, including the Protectorate of Grayson, the Kingdom of Torch, and the Andermani Empire.
- Honor Harrington - Haven: Haven, both the People's Republic of Haven and the restored Republic of Haven.
- Honor Harrington - Solarian League, Mesa, and Others: The Solarian League, Mesa, and other characters not falling into one of the other categories.