Each every Ultimates that Junko had corrupted, her influence over Chiaki in the digital space grew, filling her with more and more despair. She was now able to momentarily take control of Chiaki's actions from within and make Chiaki to her bidings. Against her own will, Chiaki helped Junko to recreate a copy of her older sister Mukuro. However, to Junko, Mukuro was nothing but a tool, a mean to an end. Therefore, instead of restoring Mukuro's mind, Junko forced Chiaki to release a part of her virus that would use to infect her older sister. With Junko serving as her mind, Mukuro transformed into a new version of the fake Junko who possessed both Junko's beauty and twitsted mind as well as her own physical prowess. Now full controlled by Junko herself, Mukuro had once again become Junko's mindless servant.