The Emperor's Children Armor is a power armor set in Space Marine multiplayer. It is a DLC item available to players who pre-ordered Space Marine from Best Buy. Later released in Traitor Legions Armor Pack.
The Emperor's Children Legion betrayed their figurative father – the Emperor of Man – some ten thousand years ago, during the Horus Heresy. The Legion fell to the perverse temptations of the Chaos God Slaanesh, becoming addicted to the sensations of battle and conquest. They have served the Prince of Excess ever since.