Flesh Sculptors

The Flesh Sculptors of Callisto were a secret sect within the Church of the One of scientists, doctors, and other professionals. The only ones who knew of their existence were the Hand of Titus. Flesh Sculptors were given the Undesired, people within the Church of the One who had unwanted genetics or could not reproduce. With these people they committed unspeakable atrocities: experiments with cybernetics, mutilation, amputation, and torture; the creation of slaves using lobotomies; intentionally driving them insane to study psychology; turning people into grotesque piles of limbs and flesh to see how long they could survive; and so forth.
The Flesh Sculptors were obsessed with inflicting pain and creating gore, considering it their duty in life. Due to this obsession, they did not give their victims sedatives and reveled in their suffering. Titus encouraged their sadism, allowing them to conduct horrific experiments which were predecessors to Titus' own and those of the Velvet Guard. Many of the Sculptors' experiments and operations were used to benefit those who were not undesired, but many were also just to inflict pain on those they deemed inferior.
Although officially the Flesh Sculptors' works were meant to be experiments for the betterment of mankind, secretly the Sculptors considered themselves artists and flesh their clay, hence their name.