Tris never relaxes, in fact she doesn't know how to relax. Tris works a soul destroying job writing websites, leaflets and other bits for large companies. As a freelance ghost writer and perfectionist it's not work she can just put down. When she's working on a piece it occupies her thoughts at all times and when she's not working on a piece she's constantly checking her emails and worrying about when the next piece of work is going to come in.
Tris is also writing a novel, which used to be relaxing but now even that stresses her out. She's been working on it for years and she is so unhappy with her lack of progress that it's becoming an obstacle in itself. She had a five year plan that's been completely destroyed by her inability to finish and publish her novel.
This Kruise is Tris' first holiday since she was in school. Even on the boat she was using her phone to check emails for assignments and trying to write her novel. Being stranded on this island is probably the best thing that could have happened to her, no signal, no power, no stress. Finally, a chance for her to relax and refocus.
Unfortunately, Tris' body is not used to relaxing and she feels constantly agitated by having nothing to do. She's taken up repetitive tasks, such as sorting rocks and picking up litter to occupy her mind without being too mentally taxing. Which for Tris is about as relaxed as you'll ever see her. (256 words)