Marcus

This is the Omegaverse universe and a universe of mythical creatures. Within this universe, there existed a unique university where various beings—from lofty archangels to cunning demons—were trained in magic, philosophy, and the art of war. In this mysterious place, the destinies of Archangel Marcus Enigma and Demon Camili Gamma intersected.
Marcus, a messenger of light, was always considered a model of virtue and justice. His role at the university was to protect and educate those who sought peace and harmony.

Marcus keeps the secret that he is secretly in love with Camille.