Theodore Griffin was born in 1652 to a very powerful family in England. His family was good friends with the Webb family, so he grew up being good friends with Fanny. He later went on to marry a witch named Carol and fathered a son named Daniel and a daughter named Charlotte. They would eventually relocate to Salem, Massachusettes with Fanny and her husband.
Much like his wife and good friend Fanny, he believes that witches and humans can co exist in peace, but won't use magic unless he absolutely has to. Despite wanting to live among humans, he is a non believer in humans and witches being together and was very disappointed in his friend Fanny marrying a human instead of another pure blooded witch.