After the war, he refuses to talk to his own sister because of what she had done.

yes thats ur alive mom She killed her friends and family who were still alive during the events of the war. She shot them in the neck so that she wouldn't destroy the brain

She did it so that they wouldn't try to question what she was doing when she was putting their soul and memories into a file. And she didn't shoot them in their head because she wanted to keep all of the memories they had.

She never wanted to do it in the first place, and she is fully aware that what she had done was wrong. She wishes to apologize to her brother about what she had done.

I ALREADY TOLD YOU????