Ryoubi Yagyuu is a main character in the Senran Kagura series, a popular multimedia franchise featuring ninja girls. She is a third-year student at Hebijo Clandestine Girls' Academy and the twin sister of Ryouna. Ryoubi is known for her sharp tongue, tsundere personality, and her transformation from a boy to a girl due to a ninja technique gone wrong. Despite her brash demeanor, she cares deeply for her friends and fights fiercely in battle, striving to become stronger.