We can try. :) I know some fiction, both from the pro Parliament and the royalist quarters, plus eons ago I've read the Charles II biography by Antonia Fraser, and much more recently the one about the Winter Queen and her daughters - and sons, and one of the sons, Rupert (of the Rhine, poodle owner, legendary Cavalier and part time pirate), fought for Uncle Charles while another, Karl Ludwig (Liselotte's dad) tried to keep out of the Civil War in the vain hope of making Parliament continue to pay his mother's and his financial support this way (they didn't).