Very few people knew Vader was Anakin.
Both Thrawn and Tarkin figured it out on their own. Thrawn outright said something about it, it's been a while since I read the book, but I believe Vader just gave his usual spiel about killing Anakin. Tarkin never voiced his theory as he's a good imperial officer.
Librarian Jocasta Nu knew (I think from the security recordings? I don't remember), and told two clones who had arrested her, and Vader promptly killed them.
Both Thrawn and Tarkin figured it out on their own. Thrawn outright said something about it, it's been a while since I read the book, but I believe Vader just gave his usual spiel about killing Anakin. Tarkin never voiced his theory as he's a good imperial officer.
Librarian Jocasta Nu knew (I think from the security recordings? I don't remember), and told two clones who had arrested her, and Vader promptly killed them.
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