It seems like there might be some confusion in your question about specific characters and events in the Star Wars universe. As of my last update, there isn't a character named "Darth Mortis" recognized in the canon or expanded Universe; however, the term "Mortis" refers to the Mortis Gods from the "Star Wars: The Clone Wars" animated series, which includes the Father, Son, and Daughter who represent different aspects of the Force.
If you are discussing manipulation relating to Anakin Skywalker, it’s important to highlight how various characters, including Palpatine (Darth Sidious) and the Force entities like the ones on Mortis, influenced Anakin throughout the series. Palpatine's manipulation of Anakin was central to his ultimate turn to the dark side and his transformation into Darth Vader.
In the Mortis arc, Anakin is shown his potential future and the struggle within him between the light and dark sides of the Force. This arc emphasizes the idea of destiny and choice, showcasing how Anakin could be swayed towards darkness through manipulation and his deepest fears and desires.
Similarly, Palpatine's long-game strategy was to use Anakin's emotional vulnerabilities—fear of loss, desire for power, and need to save those he loved—as tools to lead him to make choices that would aid Sidious's broader plan, which ultimately led to the execution of Order 66 and the rise of the Galactic Empire.
If you could clarify or specify more about your question, I would be happy to provide more details or insights!