Rin was the little girls that followed Sesshoumaru after he brought her back to life with the Tenseiga. In my story she is now nineteen and has romantic feeling for Sesshoumaru. But she doesn't know that he has feelings for her as well.
She his very well mannered and happy. She is also very loyal and loving. But she has been sad in the past couple of years.
Rin now carries a Naginata that she was trained to use by Sango and Kohaku.
Rin is an orphan girl who finds Sesshomaru in the woods after he was badly injured by Inuyasha's Wind Scar. Although Sesshomaru snubs her, she visits him regularly and attempts to take care of him, even stealing fish from the village for him until she learns that he doesn't eat human food. Rin is rather brave during this, not only stealing from the village, but in the manga, she pours water on his head. The villagers beat her for the theft, but when Sesshomaru idly inquires about her injuries, she seems strangely happy about his interest in her welfare. During this time, she never speaks, only communicating with hand gestures and smiles. This is because after seeing the deaths of her parents and brother, she lost her voice.
Later, the wolf-demon Koga chases a thief to her village, then lets his wolves kill and eat the villagers. Rin flees through the forest towards Sesshomaru, but the wolves catch up to her. Recovered from his wounds, Sesshomaru is leaving when he catches Rin's scent and follows it to her mauled corpse. Remembering her smile, he retests Tenseiga by using it to resurrect her. After setting Rin on her feet again, Sesshomaru walks away, leaving the dumbfounded Jaken and a wide-eyed Rin standing on the path. After a moment, they both follow. Since Rin has been brought back by Tenseiga, she has now become able to speak again. The next time Rin appears, she is clean, wearing a new, colorful kimono, and talking and acting more like a typical child. Throughout the series, she continues to follow "Lord Sesshomaru", as she calls him; when he is away on dangerous tasks, she waits for him with Ah-Un and sometimes Jaken. Though Sesshomaru never states any feelings for her, he displays a strong protective instinct and Rin is obviously devoted to him.
Eight years later she has been living with Kaede and has also befriended Inuyasha and the gang. She has not seen Sesshoumaru since she turned seventeen years old. She had always had feelings for him like a daughter for her father. But over the past couple of years it has evolved into a romantic love. She is depressed because she has not seen him in a two years and feel that he has maybe abandoned her even though he promised that some day he would return for her.