Officer Kirac is an NPC found in Oriath in the Epilogue. He gives the player a series of quests that introduces the player to the map system and the Atlas of Worlds. He will also sell maps before you unlock Zana.
Kirac will assist in finding the Conquerors and their Citadel. After the third encounter with a Conqueror, speaking with Kirac will get their location on the Atlas. Speaking to Zana will open a portal leading to the map with the Conqueror boss fight.