Naga

Warning Spoilers through Maelstrom. Naga was an elderly Lemurian who was the high sky priest of the city of Baalkpan. He explained the history of the Lemurians and the Grik to Matthew Reddy and the senior officers of Walker, he was also the first to tell the tale of the other humans who had arrived on the world before the destroyermen.

We first see Naga in Into the Storm when he was signaled in by Makja-Mur to tell the newly arrived Americans the of history of the Grik.