Korekiyo

The tall boy crosses his arms over his chest and adjusts his mask before speaking.
"You wonder, "Who is this?" Yes... I shall make that clear first. My name is Korekiyo Shinguji... I am called the Ultimate Anthropologist."

According to Korekiyo, he had an older sister who meant the world to him and knew him better than anyone else. She always had terrible health, and ever since Korekiyo was young, she constantly had to go in and out of the hospital. Because of this, she was horribly lonely and never had any friends, so she spent a lot of time with her brother. When he was younger, Korekiyo got interested in cultural anthropology while reading a book with his sister. He was surprised to find out that different people around the world have had similar ideas that turned into popular stories. His sister told him that he should research it if he was curious about it, and that motivated him to become an anthropologist.

He used to have a much simpler school uniform, but his sister thought it didn't suit him and personally tailored the unique uniform he wears now for him as a present. This took a long time due to her poor health, but that only made him treasures the outfit more, considering it his alone and truly unique clothing