An assistant from Wilheim, , is revealed as the mastermind behind this experiment. She is a bounty hunter of sorts seeking out Professor Eiselstein's "Philosopher's Catalyst". Camilla helped the Professor create the true Catalyst by posing as a scientist named Greta Riddell, who he makes his assistant. She eventually reveals herself when she kidnaps Armony in an attempt to take the wing from her to become more powerful. However, Wilhelm interference with an Etherflower and the wing is destroyed as Camilla appears to fall to her death after attempting to kill the Elrics for her plans being ruined. In the end, with Colonel Roy Mustang and Armstrong as guards to prevent Edward's interference, the catalyst within her body is released, killing both the professor and her. The Elrics later return to Central alongside Armstrong while reading Armony's letter to them. Mustang's group arrest the military personnel who had been seeking Armony.