For mine I changed one trait. I made Sapphire a faunus. With her father's extreme distrust of all faunus there relationship entirely changed. She became distanced from Oliver and Cecily (Brother and Sister) because Janus gave them preferential treatment. When Melanie died rather than taking out all his anger and frustrations during Oliver's hunter training Janus turned on his faunus daughter. Because of this Oliver's training was less extreme and he didn't feel the need to flee the family. Because Oliver was still present and because of the distance Janus had created between Sapphire and her siblings, the need that Cannon Sapphire has to protect her family was severely lessened. In the original backstory without Oliver Sapphire was all the other two siblings had between them and her father and they were forced to band together to survive. Because Oliver was still present and Sapphire wasn't as close to her siblings as she should have been, when she accidentally killed Janus she didn't have the sense that her family would protect her and she also didn't think that they would need her so she ran.

At this time Demetra was a child, no older than a year or two old. She never met Sapphire at a time that she could comprehend her and she didn't remember Janus' cruelty and so thought of Sapphire as a monster and decided to join Beacon so she could learn the skills to combat Sapphire. In her mind Sapphire was the reason that her family was fractured because she even when she was told what Janus was like the fact that Sapphire killed him, even in self defense promoted the fact that in her mind Sapphire was the bigger evil.