Riza takes such immense joy in ruining Roy's life that he can't even bring himself to begrudge her.

Everyone is born with the ability to only see the colour of their soulmate's eyes. Only upon touching their soulmate, can people see the rest of the world's colours. Edward Elric will do whatever it takes to get his brother's body back and ensure he can have his happily ever after with his soulmate, even if it means never finding his own soulmate.