Currently Airing Anime

I'm saying that he could have prevented her death easily in some situations. The last time she died (when she got hit by a car) why didn't he have her inside? The FB organization stops attacking them after they reset the guy/girl's Dmail so she wouldn't have died from a home invasion. Another time when she got pushed in front of the sub. If he would have repeated that entire event, and held on to her hand the next time the little girl tried to push her, he could have prevented that death. He knows exactly when, and how, she dies. It shouldn't be hard to prevent.

 Spoiler

That's the whole point though, even if he had held her hand something else would have killed her. The point is not all deaths were shown in show, but he sure tried to avoid the situation that killed her in each time and saw that it was inevitable. She would die from something no matter what.

I finished the show too, it's awesome how they always get you on an even greater plot twist every couple of episodes, feels a bit like Code Geass in that sense.