Rin is a young orphaned girl who becomes a significant character in the anime series InuYasha. She is known for her cheerful and optimistic personality, despite the hardships she has faced. Rin is notably associated with Sesshomaru, the half-brother of the series' main character, InuYasha. After being saved by Sesshomaru, she starts to follow him, becoming a loyal companion. Her innocence and kindness gradually influence Sesshomaru, who is initially a cold and indifferent demon, bringing out his protective and caring side.