What I like is that she leave her family & never looks back anymore. She give them the cold shoulders now. Those 400 yrs of being a sword made her made her learned to give up on them. I think she also lost all her feelings for her family during those yrs. 400 yrs are really a long time & people can change a lot in a short time. Even if one day her family regret what they do to her & want to repair their relationship, it will be too late. She had already completely lost her interest in them for 400 yrs. She hates them now.
It’s more realistic this way than if changes her feeling & forgives them just because they change. Once people got PTSD they cant heal just like that. Her family wasnt the one turn her into a sword, but they were the ones who started all of this especially her father.