- Name: Serpentina
- Rank: Palatine
- Born: ~290.M41
- Status: Serving the Order of Bloody Tears
Sister Serpentina was the one who was given the duty of torturing Montus in the dungeons of Adeptus Sororita Covenant on Attero in 324.M41. From the time he spent with her she seemed like a cruel, almost sadistic person, enjoying inflicting various torture on the poor marine. However she also has deep faith in the Emperor. She hated Montus and thought that he should die.
By 350.M41 Serpentina had been promoted to Palatine and Canoness Commander Ardentia's second-in-command at the Prison-Convent on Attero. She also serves as the prison's chief interrogator.