Jin spent the time she was left alone observing the room she was kept in, which seemed to be a small lab of sorts. It was a separate room with a heavy locked door, and no windows, but several cameras- no doubt to watch her while Mitsuhide was gone. The restraints around her wrists and ankles were made of steel cuffs with padding on the inside so her wrists didn’t get hurt, or more likely so she couldn’t hurt herself. She still had her prosthetic arm on, which was restrained as normal, but as she was still new to it, getting it off would be a bit of a challenge.
She still tried though, managing open her blouse buttons by struggling and pulling her shirt with her mouth, getting it off over her shoulder to expose the straps of the prosthetic arm. She started to work on the straps of her arm, struggling a bit, but starting to get it loose.