Yui Komori was the Queen of Wild Mushrooms in " Demon Lovers " and a witch with the Demon's Eye. She was originally an ordinary witch, but after a mysterious incident, she was swept into a dangerous world and became a living sacrifice bride.
The reason why she was called the " living sacrifice bride " was actually related to her experience. In the novel, Omori was forced to become a living sacrifice by the nobles of the wild mushrooms in order to pray for the redemption of the Demon's Eye. Therefore, she became the " living sacrifice bride " and the target of others seeking redemption from the Demon Eye.
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.'
Well, it could be that Alya discovers a secret about Marinette and decides to use it against her for her own gain. Maybe she's jealous of Marinette's popularity or something.
Alya would probably be super excited and start planning everything from baby showers to future playdates. She'd be there for Marinette every step of the way, giving advice and support. Nino might be a bit more reserved at first but would soon warm up to the idea and be a great source of comfort for Adrien, like helping him pick out baby clothes or build nursery furniture.
If the grandfather is very warm and accepting, Shikaneji would feel relieved and happy. They might open up more about their relationship and their dreams. Nejire could start chatting excitedly about their future together, and Shinsou would relax and join in the conversation more. However, if the grandfather is not so friendly, they would be disappointed and perhaps a bit defensive.