Actually all of them are redeemable, all of them need a good talk which I know the situation a bit difficult.
the 1st older brother literally saw her dead so of course he has a hard time to believe she is the real one.
The 2nd older brother was a child, there’s nothing he could do and at least he open his heart to perry a bit.
The father, actually giving all his best for his daughter.
Hontein was emotionless and act too rational. Now he has his emotions back, he readilly doting her and going soft on her.