Question: how old is livvy in lord of shadows?
Answer: Livia "Livvy" Blackthorn - the twin sister of Tiberius Blackthorn, as well as the sister of Jules, Dru, and Tavvy, and the half-sister of Helen and Mark. She lives at the Los Angeles Institute with her siblings, under the guardianship of their uncle, Arthur. She is 15 years old as of 2012.