After the events of Flare, Serena wound up in the hospital for a few days. She had walked all the way from Geosenge, to the far western reaches of the Kalos region, nearly to the point where it passed their borders and became unclaimed land. She walked for multiple days, not stopping to eat, drink, or even sleep. The pain she felt in her legs and feet was lost on her, as she felt wholly and totally numb. After Olympe was buried on the forest clifftop and smashing her Holocaster to pieces, Serena walked back, intending to go home to Vaniville. She made it just outside of Lumiose, to Route 4, when her knees gave out on her and subsequently caused her to collapse.
It had been days since she’d properly taken care of herself, exhausted, dehydrated, starving, covered in blood (that wasn’t actually her own), and her throat didn’t feel right after being strangled. So naturally, when someone stumbled across her, they immediately had her rushed to Lumiose’s hospital.
She was hooked up to IVs in order to get fluids to her, and she was placed on breathing support due to the injuries she sustained to her windpipe and throat (it was already severely bruised by the time she was admitted). Serena woke up almost two days later to hushed voices, bright lights, and the sterile smell of a hospital room, all of which was very disorienting. She immediately started crying, asking where Olympe was, asking where her team was, asking if her friends were okay, and where her mom was. The nurses were trying to calm her down and get her to stop speaking because of her throat, and fortunately, at least, Grace was there to reassure her about everything. Rose was at least small enough to be allowed to be sent out, which was a great comfort to her.
It took a lot of care for her throat injuries to heal, mainly including cold compresses, pain medication injected through IVs (as swallowing pills in her condition was a no-go), and soft foods like applesauce and puddings. Serena really didn’t like being in a hospital. It wasn’t anyone’s fault, and she didn’t blame them, but having people coming in at all hours of the day, and being hooked up to a machine that was constantly making noise, the brightness of the room, the smell.... it was extremely overwhelming, especially as she was dealing with the deepest grief she’d ever felt thus far. She was practically crying the entire time, and the nurses there probably saw her cry the most out of anyone ever.
Grace was able to stay with Serena the entire time at least, as Serena was only 15 and was still a minor. Having her mom there, along with Rose, were the greatest comforts she could ask for, and were the only things that made her stay more bearable. It was a while before she was actually discharged, her throat having healed enough to where she could speak short sentences without feeling immense pain. She was given painkillers to take home, ones that she could cut up and put in water instead of taking them as is. For a while after, there were times where she’d speak and there’d be a weird tickle/scratch in her windpipe, which would cause her to pause and cough/clear her throat.
Thankfully, Serena has healed since that event. Her throat doesn’t bother her like it did before, and she gained all of the weight back that she lost through a lot of hard work. Still, though, she can’t shake the feeling of fear, anxiety, and overall sensory overload from being in the hospital. The constant poking and proding at her body, the people trying to talk to her that she couldn’t respond to without feeling pain, and the bright, blinding lights and smells.