Ryobi Shiki is a character from the 'Senran Kagura' series, known for her dual personality and complex relationship with her sister, Ryona. Initially appearing as a shy and reserved girl, Ryobi showcases a more aggressive and confident side during battles. She is a student at Hebijo Clandestine Girls' Academy and is a skilled marksman, wielding a sniper rifle with deadly precision. Her character explores themes of sibling rivalry, personal growth, and the struggle to balance her contrasting personalities, making her a compelling and multifaceted character in the series.