M. I. Castro
From Halopedia, the Halo wiki
M. I. Castro was a human who at some point following the Human-Covenant War signed for the Artificial intelligence Armored matrix containment and display module that was part of Project ALOHA-19 at UNSC Transit Dock L22, Luna on a June 27 after it arrived from Havenwinter, Ballast. The module was then proceeded to be sent to Orlando, Earth to be used by Gabriela for an Outpost Discovery.
The sign in sheet at Halo: Outpost Discovery has several nods to people involved in the process of the event. The character's name of M. I. Castro was a direct reference to marketing manager Megan Castro.
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