She was a past not to be trampled with, and Sojiro knows well about that. He desperately tried to save her from the misery and betrayal he would cast onto people, but it was futile. However, he hadn't thought of apologising once nor twice, as he decided not to bother. He looked forward to what the day will bring him along with the Shishio's promise of a new era instead of the current one he so despised. However, there is no future without the past, and it kept bothering Sojiro. He was helpless and had no choice but to face her after what happened.