Originally Posted by
Arctic Cyclist
Frog Dude is from Ozma of Oz. The rest are Oz characters as well, but I can't remember which books. Artemis as Dorothy makes some sense as Dorothy got ruthless and vicious in latter books, as well as advocated for the Wizard being forgiven and allowed back into Oz. But honestly? Biz matches Dorothy's personality.
On further thought, I think all of these characters are from Ozma of Oz, which makes Jason Ozma. I'm down with that. Under Lobdell he has mirrored many of Ozma|Tip's journeys...and oh! Oh! Bizarro is Jack Pumpkinhead. As you may recall, Jack's intelligence goes from being the most brilliant person in Oz to an utter nincompoop depending on the state of his head. Artemis could be either Betsy or Dorothy, but it's been so long that I can't remember everyone's names and personalities aside from the fact that Dorothy kicked ass and was the dreaded one.