Merazophis

Merazophis is a human turned Vampire by Sophia. He is also her butler and was her caretaker when she was a toddler. At present, he is the Commander of the Fourth Demon Army, but continues to be Sophia's butler and one remaining family member from their hometown.

Plot
Originally he was the right-hand man and valet of the lord of the Keren territory in the country of Sariera. Having been caught up in the conflict between the Divine Word Religion and the Goddess Religion, he became a vampire due to Sophia when she was almost about to be killed by Potimas. Since then he has worked under the Demon King together with Sophia, and after distinguishing himself in the Demon King Army he rose up to become an army commander. While he has the rank of an army commander, he gives maximum priority to Sophia. Having sworn an oath of allegiance to the now deceased lord and lady and having inherited their dying wish, he puts in great efforts every day in order to become a man who can protect Sophia.