"You did not fail, Rioux." Rain spoke up once again, hearing Ryo mumbling to himself. About how he completely forgot one of the most precious memories he had with her, and how he failed to keep the promise, and ended up leaving her all alone when she, in fact, lost everything she had for herself. She tried to leave behind all the glory and title and name she got thanks to her parents, but at that time, Ryo didn't keep the promise, as he said he would.
"I did fail, I wasn't there for her, and watched her die."