Nightmares
Everyone in AVALANCHE had nightmares. It wasn't uncommon for someone to wake up in the middle of the night to stare at the fire. Sometimes more than one person would be there in the morning. Vincent knew, because Vincent hardly slept. He would take as many watches as he could, and even when he wasn't on watch he would stay awake for as long as possible. He had slept for thirty years, he didn't need the rest and his dreams of blood and Hojo and Lucrecia would wake him anyway.
No one said what they dreamed of that left them pale and drawn in the morning, but he could guess from what he knew about them. Cloud had nightmares about Mako tubes, and Aeris and Tifa, and failing when he was needed most. Tifa had nightmares about her first meeting with Sephiroth and losing Cloud. Barrett wasn't as easy, but he knew there were dreams where Marlene died with her birth parents that made him withdrawn and sullen. Red dreamed of his family in ways that often didn't make him cry in his sleep but regret waking up. Cid dreamed of Shera trapped under a canister of air, unable to escape, and crashing his beloved Highwind. Aeris, before she died, dreamed of the Planet and woke up in tears, but never sat by the fire.
And when it was Yuffie they woke up to staring at the fire they were more surprised than when they found anyone else. They hadn't thought that the cheerful face she put up could hide horrors like theirs had. She had just laughed up at his shocked expression and brushed off his questions and then later, when they were killing monsters she had said so quietly he nearly asked her to repeat it, "I lived through the Wutai-Shinra War. I saw my mother die. I was sent away from home when I was thirteen. I'm not as innocent as you guys think I am."
Then she didn't meet his eyes for a few hours. When she started again there was no hint that she had ever said anything at all, let alone something that made him re-evaluate her character. He wondered, after, if he had just imagined it, but no, she was sitting by the fire the next night too.
And in the midst of monster killing she whispered, as she spun past him, blood streaming from her shuriken, "She died eleven years ago tomorrow."
And again, he didn't ask anymore questions, and again he only half believed she had said it. And again she was sitting by the fire in the morning.
This time, during the battle, she stood over a dead monster, eyes cold. This time, she said it loud and clear, although she still didn't meet his eyes. "Normally I leave flowers on the shrine to Da Chao, but I can't do that this year. I . . . feel worse because of that, like I'm abandoning her or something. That's why I've been having nightmares lately."