Anya initially checked the surveillance video of where those men went after attacking them near the cafe. To waste her time, they were all scattered as if waiting for someone or something. Hence she had to backtrack to find out where they came from.
The camera in the stateroom and public area are more at regular space than the camera at the crew space. Anya had to struggle a little to keep track of the right camera.
She wasn't surprised to find out those men weren't from the guest section but the crew section. The crew section was divided into two more sections. middle, and lower sections. Those men were from the lowermost section. She wasn't sure if those people were cleaning staff or engine room staff.
A question appeared in her mind. 'Who allowed those men to enter the public space?'