Rin has got 16 years on the picture. She had a crush on Sesshomaru at first sight when, being a little child, had seen him having wounded near a tree. He have rescued her from claws of death for many times, he did not even notice that the child was changing his chilly nature. Glimpses of compassion and empathy emerged...
She breathed and grew thanking to him and for him. When time had come, she followed him without any thoughts.