Two pale middle-aged pre-teens back to back with violet eyes and white hair

Two pale middle-aged pre-teens back to back with violet eyes and white hair, with the one on the left with short white hair in dark alchemist clothes and with the left arm with a steampunk prosthesis with a pentagram raised, and the one on the right in white nun's clothes with a rosary, at sunset with a bonfire behind with a cross in the middle behind