The two masked women behind Otto in Nadir's room were very likely Alexander's two sisters (if they are not completely new characters) since Nadir respected them more than Otto and Veronica mentioned that the two sisters adored Callista more than their own brother.
(Otto was the one who escorted Callista to the helicopter in Olivia's memory. Guess Callista, the two Karlsson sisters and the dewhat company were somehow related).
(Otto was the one who escorted Callista to the helicopter in Olivia's memory. Guess Callista, the two Karlsson sisters and the dewhat company were somehow related).