A Golden Age scientist who worked in the Ishtar Academy studying the Vex and was one of the creators, I believe, of the FWC Device

Maya Sundaresh was a Ishtar Collective scientist, who according to the Grimoire survived being captured in a Vex stimulation and sent copied versions of her and her teams minds through a Vex gate, which is probably why his theory is that Maya and the Exo Stranger are the same as a version of their minds could have ended up inside an Exo squadron.