------S L O W U P D A T E S------- Rin Kozume is Kenma's twin sister. The twins were inseparable. But then their father moved to Miyagi and brought Rin with him. You lived in Miyagi until the end of your first year in high school. Your dad thought it would be a good idea to move back to Tokyo. I do not own haikyuu. I only own the character Rin Kozume.