Sona's Sins

Sona's Sins(ソーナの罪; Sōna no tsumi) is the name given to a certain organization in Highschool DxD: Яe-birth, appearing as antagonists of Serena Sitri's Peerage. A group of low-class devils who attented the Sitri's School for Rating Games, the bunch grew arrogant of their sudden power and caused riot and destruction against High-class Rating Game schools, being consequently exterminated by Cohen Lucifer, only a few members surviving and gathering for an upcoming revenge.