Deimos was a Green Martian and the first keeper of sacred scrolls.
At some point in time, at the dawn of the Martians, H'ronmeer gave his two children, Phobos and Deimos two items: The Book of Sacred Scrolls, and the Staff of Kolar... The symbols could be shared, but the staff could not. Deimos chose the Symbols, but Phobos chose the staff. Phobos was the first White Martian. At this time, Deimos became the first keeper.