Livilla

Livilla was a creation in Eugene Tacitus' world. It it she was the wife of Pepin VII.

Pepin's coronation
Like all wives of the imperial family before her, Livilla was selected based on her looks rather than her personality. When Pepin was crowned king, Livilla became a goddess. However, Pepin doubted that he was a god. The Sixth Doctor and Frobisher landed amongst them. Livilla berated Pepin for not agreeing that they were a conjuring trick of his. With that, Childeric ordered their execution. Eugene Tacitus saved them by saying past kings have experienced metal fatigue after their coronation.

As a Goddess
Livilla asked Pepin to start behaving more like a god. He refused, telling her that he intended to abdicate. This would mean her death, so she told him she would side with Childeric in his rebellion. She left telling him that upon their next meeting, she would kill him.

Livilla visited Berengaria in jail. She asked her to announce she had made a mistake; telling everyone that Childeric was her legitimate son as opposed to Pepin.

Livilla then visited Childeric and offered herself as his consort. Childeric's son regressed Livilla to a baby before killing her. (BFA: The Holy Terror)