ガルディス

“You are my precious way to pass the time—toys that must not be broken.” The king of the Demon Nation Desraid, and currently the only being known as the Demon King. Feared by humanity as the root of all evil, he is nonetheless deeply loved by the people of the demon nation. Beyond his aptitude as a ruler, he excels in both magic and swordsmanship, and in times of war is a fearless champion who leads from the front. However, he also takes pleasure in acting on sudden whims—such as keeping the heroine who came to kill him at his side. [Translated from the official website.]