Lykos is the capital of The Kingdom of Abanthus.
It was Nevrakis Family's castle. When the Iron Empire did not get the Five Kingdoms rulers to pledge loyalty and thus fall under the Empress Azura's life-stealing rule, Luther made Lykos his starting point for his war campaign.
King Luther Nevrakis orchestrated the assassinations of the other four rulers of The Five Kingdoms. However, Luther did not kill the immediate heirs to those thrones. Luther leaves Lykos to Princess Zenobia Nevrakis when he goes to battle with the Iron Empire. In book 2, Queen Kenna Rys of Stormholt captures Lykos and is then de facto ruler of The Five Kingdoms (albeit King Tevan of Fydoria and Queen Rowan of Bellmere at Thorngate, depending of player's choices if these characters are still living, may still have some self-rule).