This is fun but difficult to do. I'll try the descriptions for Alucard, Richter, and Maria, just because I'm now addicted to this kind of translation.
Alucard: A half vampire born of the union of Count Dracula and the human Lisa. After reviving Dracula, he seals him with his own blood, and he then submerges himself. He appears beautiful and silent, which contrasts with his powerful body, which he used to destroy Dracula and he fights forever.
Richter: He was once praised for being the strongest and his defeat of Dracula. He is now ashamed of being controlled by Shaft and abandons his role as vampire hunter. The holy vampire killer whip again responds to a dark power, so he again takes up the whip.
Maria: A girl who has the power of defeating demons by summoning the power of four holy animals. She has fought twice in the past. During the first time, she was twelve years old. During the second, she was 17 and searching for the missing Richter at Dracula's Castle alone. After Dracula was defeated again, she and Alucard acted together.