Yuuma's past-life self 1900+ years ago and Sirix's wife. Serena was the daughter of Pompeii's surgeon. She was known to be angelically beautiful and kind. Keidai once said that he wouldn't be surprised if she had captured the hearts of every man in Pompeii. She is shown to be very sensitive about the way people treat her friends, once slapping a man who had made fun of Sirix and Loleus. She does not approve of gladiatorial fights or violence of any kind. She promised to wait for Sirix forever when he left to defend the House of Felix, but the two were never reunited.