Thanks so much for reading!
Yes, Sidney and Adora are OCs (as well as hosts of a charity event called BIPOC VampDay). There will be more comics with Sidney - including a long form comic set in the 1920s called "The Arrangement", so you can learn more about him in that story. Adora was created by Midnight Pursona - I'm not sure if she'll do any written stories with Adora in the future, but Adora often has mini adventures with Sidney to help promote BIPOC VampDay in comic and cosplay form.
There will be more!