KING's RAID

The Gretchen family is a high-ranking vampire family that is called as the guardian of wisdom and the pursuer of knowledge. They have poured their efforts into the study and knowledge of magic for centuries. While they were the distant relatives of the princess Lewisia, they always have upheld the rule of not interfering with the humans, as they believed humans were fools who were easily swayed by greed. But when the current head of the family, Vilhelmina La Gretchen, married a human, their immense knowledge that was concealed for centuries finally became accessible to humans. Barsi, the human who married Vilhelmina and took on her surname, was an alchemist of the Tower of Sage. He had been studying the beings of darkness which the vampires commanded and the darkness that had spread in the world. When he first heard rumors of the Gretchen family, he went to them and asked to become their student. After many incidents, Vilhelmina and Barsi soon became fast friends and came to love each other deeply. That is how Evan La Gretchen, one of the most brilliant minds among the Tower of Sage alchemists as well as the half-blood child of Vilhelmina and the human alchemist Barsi, was born. Unfortunately, Evan was weak from birth. Although he had inherited his mother's great darkness, his body was the same as a human, and therefore couldn't bear the dark power. He was always on the verge of death, and he couldn't even walk properly. In addition, since one of the properties of darkness was absorption, he was in constant danger of being devoured by his mother's power. After thinking about it for some time, Barsi took Evan and returned to the Tower of Sage, while Vilhelmina remained in her castle and continued to seek a way that her son could live more safely. Thankfully, Evan grew to be optimistic and positive, just like his father and showed interest in researching darkness. As he grew older, he tried to control the darkness within him. He acquired extensive knowledge of runes, alchemy, and elemental magic, becoming the greatest alchemist of the Tower of Sage at the age of 15. The only thing that he couldn’t use was the magic that controls blood. Although the blood of a high-ranking vampire flowed in his veins, his body was too weak to hold up against the use of such magic. Despite this fact, he has achieved countless accomplishments, such as creating his own homunculus Naav Gehen as well as studying and observing the darkness that affects the world with Lewisia. To commend his talent and accomplishments, the Tower of Sage granted him the title of 'Green,' meaning 'Researcher'— an honorable title given only to those who have attained incredible success with their research. While he still sometimes experiences slight pains and aches due to his inherently weak body when the power of darkness becomes stronger, nonetheless he has learned to survive without the help of his parents. Now, he is able to use his power of darkness freely and shows interest in the demonic energy of demons and the power of dragons as well. He also discovered a new type of darkness that is completely different from the currently existing darkness, and named it 'Tidhar.' Until recently, Evan had been staying at the Tower of Sage, continuing his research on darkness, and keeping a close eye on the 'Eclipse phenomenon' discovered in the Aegina Desert. When he received a letter from Lewisia asking him for help on the darkness that appeared in the desert, he left for the sandy lands with Naav Gehen by his side.