Hellish.
It was the one word Hayashi could use to describe rehabilitation training. The two years spent training to become a demon slayer were nothing compared to the hell she was being put through now. Morning to night, all she did was run laps around the wind mansion, for an entire week. Once Sanemi had deemed her "properly warmed up", he had made her swing her sword until her arms damn near fell off. If he had caught her slacking, then another hour would be added onto the sword swinging. And caught her slacking he did.
Eventually Hayashi became so exhausted, so tired, that she ceased to complain. The amount of exercise put onto her unwilling soul took the already minimal energy within her into the negatives, and sleep became the only escape from the demon that was her master.
Initially, when Hayashi had heard that she needed to complete rehab training before she could go on missions again, she had only been annoyed. The girl had enjoyed sleeping all day and not having to worry about missions, although the other three demon slayers she had to share a room with had been quite loud, it was something she had learned to deal with in exchange for the free food and rest.
However, when Hayashi had learned that the entirety of her training would be led by Sanemi, the only emotion she could feel was fear. She had begun to count down the days leading up to what might possibly be her death, and even her sleep was filled flashbacks to when Sanemi had still been training her.
Hayashi had considered running away, multiple times, but that would only make things worse. But it didn't stop her from trying to delay the training for as long as possible.
The morning she was supposed to return to the wind mansion, Hayashi took and incredibly long time to get ready. Her things had already been moved back to her home, but after "accidentally misplacing" her uniform, and going to open every room and the butterfly mansion, so had found it. Another issue that Hayashi had "encountered" was the fact that her shoes has mysteriously gone missing, and she'd refused to step foot outside without them for she "feared the sticks and stones on her fragile feet". Her shoes were later found on the roof.
It had been evening when Hayashi's "string of misfortunes" had ended and she finally made her way back to the wind mansion. Strangely enough, it had been empty. Walking in there she found no sign of Sanemi, and no sign of any possible traps that he had set. The first night back in Hayashi's home had been spent completely sleepless and in utter fear of surprise attacks and violent flinches at loud noises. Sometime in the early hours, she succumbed to exhaustion and fell asleep.
The next day was equally as confusing, no one was home and Hayashi kept looking behind her every few paces. It wasn't uncommon, seeing the wind mansion so empty, seeing as Hayashi's years spent training to become a demon slayer were spent alone, as Sanemi had been out frequently for missions, but it was eerie being alone in such a large house.
On the third day by herself in the wind mansion, Hayashi became a little more relaxed. Maybe Sanemi had forgotten about her rehab training, maybe this would be her life from now on. Hayashi allowed herself to dream, which was the biggest mistake she could have made. She went to sleep that night with a rare smile on her face, convinced of fact that Sanemi had forgotten about her. Assumptions were dangerous, that was something Hayashi had learned from this experience.
It had been a couple of months since the training had started, and Hayashi was entirely sick of it. She had never wanted to go on a mission before, but there was a first time for everything. So when Hayashi's silly little crow nearly died crashing into a window to deliver her news that she was going on a mission, she nearly cried of joy. Rehab training had finally ended, and she was free from Sanemi's evil clutches.
The very same day Hayashi set out on her mission, relieved by the fact that she was finally able to breathe in peace.