Yui Komori

Her story in first game manga adaptation and first season of anime strated when she was 17 and her father told her that she will be living with distant relative

Her story in first game manga adaptation and first season of anime strated when she was 17 and her father told her that she will be living with distant relatives because he needs to move abroad for work. Later Sakamaki brothers tell her that she's a sacrificial bride given to them from church.After spending time at Sakamaki's mansion she learned many things about brothers and discovered some things from her own past unknown to her before.After Laito pushed Cordelia from the balcony Richter cut out her heart from her dying body and implanted it into another one. He then handed Yui to vampire hunter Seiji Komori to hide Cordelia from his brother Karlheinz. Seiji who was also a priest raised Yui since then as his daughter. Seiji never told Yui about adoption and instead said that her mother died when she was still a child.Because Cordelia was the daughter of the Demon King Burai her blood had a special power flowing within it. Since her heart is inside of Yui her blood is more special than other humans. All the brothers note that Yui's blood is of the finest quality. In addition her chest will hurt when Cordelia reacts to something.