Eventually, Kanako and Sanae came to live with us, as did Satori and Koishi, Nitori even, uprooting their lives so they wouldn't run the risk be captured. Of course, that meant Yuuka had more laundry to wash and we had to divide up resources and share them equally. However, that sometimes became the source of some frustrations, as some of us couldn't get along and there was a lot of stress. To much upset and because of the circumstances, I had grown a bit selfish, negligent, and resentful, targeting my resentment and negligence to Reimu, the little child I had loved quite dearly, yelling and, sometimes, swatting at her when she came near me. What a horrible cold-hearted bitch of a kitsune I had become! I found myself to later be repentant towards my treatment of Reimu, after she had sustained an injury that rendered her legs permanently paralyzed, leaving her unable to walk. Upon learning she was injured, I wept bitterly. I allowed this to happen and I had treated her so badly. To much surprise, Reimu still reached to me for comfort, even though it was my fault.
As soon as she threw her arms around mine, I found redemption for my actions and realized that she had forgave me. She wanted to be cradled and loved by me again. Even though she was reverted to a toddler, mentally and otherwise, she was still Reimu. I gathered her into my arms and kissed her on the head, saying, "I'm sorry, Reimu-sweetheart, I'm so sorry." She forgave me but I can never forgive myself.
She feels regret
Yes, she does and is deeply repentant
for her actions