It's was far too late to feel sorry. Thats something she knew now.
When she was young she was selfish and spoiled. She could understand that it was too much for her to burden. And now, with her last breaths she could understand why she never came back.
She always tried to be a good daughter.
And she wanted to be loved in return
So her last breaths and her very last thoughts were dedicated to her. She really hoped that this guy would make her happy, Kami knew that she would hunt him otherwise.
I'm proud of you, Kyouko.