Ruby had been dreading this day for weeks, the outbreak hadn't affected her or her own at first, but it took it's toll eventually. Mary Margaret was the first to go, her husband, David soon following her out of the land of the living. Their losses were hard on all of them, but MM had been Ruby's best friend, her confidant, the Eagle Two to her Eagle One.
For a while after losing MM and David, Ruby didn't know how to react, she didn't know how to handle loss well, but luckily she had her fiancé, Peter to back her up, to comfort her when things got tough, to show her that while loss was hard, focussing on the fact that they were still alive was more important until they found somewhere safe.
About 3 months into the outbreak, Ruby and her group stumbled across another group, people they knew from town, including Belle, Emma, Henry, Regina, and Mr Gold, who was on his last legs and would probably be subject to a mercy killing soon enough. He was slowing everyone down in a world where speed had suddenly become a necessity. Especially in the night, when the walkers were faster, meaner and ever so slightly harder to fight off. Gold would be next to go. And Belle - poor, sweet, innocent Belle who wouldn't hurt a fly - would be the one to shoot him point blank in the face just before the walkers could get him. I guess war, because it was war, changes everyone.
Ruby knew that their huge group would eventually become a hindrance, but she couldn't bring herself to make the split. She had to stay with Granny and Peter, but Belle had become the person she was closest to, and Belle wouldn't leave her group, which were beginning to become a problem, what with Henry always complaining and Regina always fighting with Emma over who was more skilled at killing walkers.
Everything seemed to right itself, however, after Whale went on a run, coming back with enough supplies for everyone to have a large meal and extra food to take on the go, causing everyone to stop being so grumpy for once, for everyone to get along. The friendly atmosphere lasted a few days to a week at most, before the truth shocked everyone back to reality. Even the most unexpected person could be caught unaware. Emma was dead.
The chaos that the loss of Emma caused was phenomenal. Fighting broke out between everyone in the group, loud fighting, drawing more walkers near. By the time they had all been dealt with, the ground at Ruby's feet shone with blood, both human, and walker.
Ruby had been dreading this day for weeks, at first the outbreak hadn't affected her or her own much. But now, now it had ruined her and her own. She stood, staring at the mess of bodies at her feet. Regina, Henry, Belle, Whale, Leroy, Ariel, all dead, all beginning to stir with life once more. Peter and Granny flanking her as she dispatched them, tears falling freely as she did so.
Luckily she had her fiancé, Peter to back her up, to comfort her when things got tough, to show her that while loss was hard, focussing on the fact that they were still alive was more important until they found somewhere safe.
Ruby had been dreading this day for weeks. She had finally lost everything. Peter had been hiding a bite, he was done for. Dying. The one thing, the one person keeping her going and hopeful was dying. He begged her endlessly, kill me, kill me, kill me. But she couldn't. She wouldn't. She couldn't see a life without Peter. He began to turn, starting to eat raw animals, and Ruby knew she had to give up and kill him, and she did. Slowly, carefully, she snuck over to where he was and stabbed a knife through his eye, cutting the connection from the brain to the rest of the body, ending his life, before opting out herself, leaving Granny as the only survivor. The only member of the group alive.