Helena Sator

""The Immune are the only resource left to this world.""

- Helena Sator

Chancellor Helena Sator is the enigmatic, highest-ranking official of ACDIV. She initially opposed the use of Immunes for the Trials but eventually gave in to Ibara's wishes. The epilogues of the three sequel books consist of an email written by Chancellor Sator to her associates.

Personality
Although Helena does not make many personal appearances, she is still revealed to be exceptionally intelligent, charismatic, and resourceful. She's also extremely adaptive and is capable of manipulating any change in plans to the advantage of her goals, to such an extent where they benefit her plans directly. She is a utilitarian, and when ACDIV's attempts at finding a cure fail, she abandons them to put into place a backdoor to save the human race (alternatively, one could say that it's the rest of the ACDIV employees who abandoned her and ACDIV's original goals of saving the world, to keep their organization alive). She is also shown to be kinder than her outer personality would suggest.

Physical Appearance
Chancellor Sator is an older woman with reddish blonde hair.