Deculein Yukline

A genius older brother who's always proud and noble, always observes etiquette and has noble demeanor. He's mature and only 26 years old renowned professor from a powerful academy. He has obsession over cleanliness and organization, has amazing aesthetic sense and highly capable man who's rich and comes from a noble household with a long history and abundant power akin to a duke just below the emperor. He's very cold and hard to read but has keen observation skills and grasp situations in the blink of an eye. He's a powerful figure and famous but he cares a lot about his one and only family member left, his sister. Though he is a little strict with her but not too much, he acts as a dependable and strong brother yet cold and has a soft spot for his sister and can only be swayed by his sister.