Selected by Yurine to be Karas, Eko was the protector of Tokyo during the Edo period. However, Eko realized how to take power in the world by upsetting the balance between youkai and humans. He turned his back on Yurine to realize his plans for dominance, and in doing so changed the course of destiny. The main component of his plan is the transformation of youkai into cyborg-youkai to form the Mikura army. His goal is the transformation of every youkai in Tokyo, and with them Japan, and then world.