Self-concept is who you think you are. Self-esteem is how you feel about who you are. Kagome herself felt she was a strong, independent woman who sometimes was too much of a klutz for her own good. She felt good about it- after all everyone had their faults but not many women could say they were effective communicators.
"How do you feel about who you are- your self-esteem." She provided waiting for his response.
"Proud, happy, angry, foolish, disgusted." His eyes were faraway and Kagome sought to bring him back to her.
"Well, let's work on that okay? You need more positive adjectives in there."