Vader gets hold of Luke and Leia when they're babies, but Luke is born blind. Although it may have nothing to do with him, Vader blames himself for Luke's condition, and treats Luke like glass.
He knows that with the Force and training, Luke could well be just as powerful as Leia will be, but decides it will be much too dangerous for him to be heir, so focuses that training on Leia. He instills in Leia the need to protect her brother, which Leia also fulfils aptly.
Maybe the twins realise how fucked up the Empire is and run, or they're kidnapped or something, but Leia still guards her brother fiercely even from scruffy-looking nerf herders even though said brother starts blooming once he's out from under Vader's wing (even if he misses t a bit).
Gen or Any/Any, Luke born blind, Vader blames himself
He knows that with the Force and training, Luke could well be just as powerful as Leia will be, but decides it will be much too dangerous for him to be heir, so focuses that training on Leia. He instills in Leia the need to protect her brother, which Leia also fulfils aptly.
Maybe the twins realise how fucked up the Empire is and run, or they're kidnapped or something, but Leia still guards her brother fiercely
even from scruffy-looking nerf herderseven though said brother starts blooming once he's out from under Vader's wing (even if he misses t a bit).No incest, please!