Another reaction could be that Marinette pretends to cooperate with Adrien at first. By doing this, she can buy time and look for an opportunity to escape or get help. She might act as if she is okay with what is happening while secretly planning her next move, like leaving a clue for someone to find her or finding a way to disable Adrien temporarily.
Marinette can react by standing up for herself. She might confront Chloe directly and tell her that her actions are wrong. This shows Marinette's strong character.
Marinette could react with disbelief and assume it's some sort of joke at first. But when she realizes Adrien is serious, she might start to get really nervous. She could start fidgeting with her hands or her hair. If she's in the middle of doing something, like working on a design, she might drop her tools in surprise. Once the shock wears off, she would most likely be very happy and accept his invitation, but it would be a very flustered and excited acceptance.
Marinette might be initially shocked when Adrien steps in to protect her. She could be very grateful and show it with a shy smile or a simple 'Thank you.'
The 'ai hoshino sex comic' is likely to showcase vulgar and improper sexual scenarios featuring Ai Hoshino. Such content is not only inappropriate but may also violate legal and social norms.
In some fanfics, there are also characters from the support staff who maintain and monitor AI Hoshino. These characters might be conflicted between their loyalty to their job and their growing sympathy for AI Hoshino. They could play a crucial role in helping her or hindering her progress depending on their own beliefs and circumstances.