The White Ghost was an special agent and loyal servant of Ra's al Ghul.
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History
Under his master's instructions, Nasser followed and spied Michael Lane after he became the new Azrael for the Order of Purity and informed of his activities to Ra's.
Following his master's command, White Ghost went to Gotham City with the mission of finding the reporter Vicki Vale and eliminate her before she revealed the truth about Batman.