Gabriel Garnett is a double agent working for the Omega Order. He was placed in the Delta Defense Alliance and was great friends with agents Alec Langley and Andrew Hazel, until Alec learned of his deception. Gabriel is famous to Alec and Andrew because of how many women he has attracted over the years.
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When Alec Langley first arrives in Starnberg to meet Ivanka Rubanenko, Gabriel is also present with Ivanka's friends, Heidi and Saskia. That night, when Alec and Ivanka escape from the Omega Order's base under Lake Starnberg, Gabriel is present to pick them up, but instead knocks out Alec and hands him over to Boris Rubanenko. He then rushes off back to Heidi and Saskia, and is not seen for the rest of the episode.
When Alec visits Leningrad to exhange information with the KGB agent Svetlana Pirushkin, Gabriel is also present and attempts to kill Alec, who still remembers when he betrayed him in West Germany. Gabriel is stopped, however, by Andrew Hazel, who provides cover fire for the deal and allows Alec to make a getaway.
Gabriel's Chinese given name, "Jùnlóng", means "Handsome dragon" in English. His family name, "Tóng", means "Red".