From Halopedia, the Halo wiki
Jacob Keyes is a Captain in the United Nations Space Command Navy under the Asymmetric Warfare Research Group.
Jacob Keyes in Halo: The Television Series is portrayed by actor Danny Sapani. Sapani’s casting was announced by Showtime on November 8, 2019.
A close-up of Jacob Keyes on Eridanus II.
Jacob manning a M46 Vulcan.
Jacob arguing with Catherine.