Violet would likely be very brave. She'd probably start looking for ways to escape right away, using whatever resources are around her. Since she's an inventor, she might try to make a tool to pick the lock of the room she's locked in.
After the initial reactions, Hermione may choose to isolate herself for a while to figure things out. She would use this time to study and research, trying to find a solution to the problem with her friends. She might also look for new allies or resources within the fanfiction world to help her deal with the situation.
She might be initially shocked and hurt. Hermione is a character who values her friendships deeply, so their sudden departure would be a big blow. She could spend some time in denial, not believing that they would actually leave her.
Her friends might be initially shocked. But then they would probably rally around her. Some friends could be super excited and start planning for the baby's arrival, like getting baby clothes and toys.
Sakura could become very angry. She has been let down by those she trusted, and anger is a natural response. She might lash out at her friends or distance herself from them immediately. For example, she could say some harsh words to them in the heat of the moment.
In case they were involved in something dangerous, like playing with matches, the mom has to be firm. She should explain the serious consequences of their actions, not just scold them. For example, she can show them pictures or videos of fire accidents caused by improper use of matches. And then, she should set strict rules to prevent such dangerous behavior in the future. At the same time, she should also encourage them to be more careful and think about safety all the time.
Natsu would probably be very confused and sad at first. He's used to having Lucy around, and her sudden departure would leave a big hole in his daily adventures. He might try to convince her to come back immediately.
Star's friends would likely be a mix of helpful and confused. Since Star is from another dimension, her friends might not be entirely sure how to handle it. But overall, they would probably try their best to make her feel normal. For example, they could plan a girls' night in for Star and the female friends, with movies, junk food, and lots of girl talk.
Her friends would likely be very worried. They might rush to her side immediately. For instance, if it's Sailor Mercury, she would use her intelligence to quickly assess the situation and try to figure out the best way to help Usagi, whether it's using her medical knowledge or finding a way to transport her to safety.
Her friends usually rush to her aid immediately. Percy, for instance, would be very protective and might even get angry at whatever or whoever caused her harm. Grover would use his nature - related skills to try and find herbs or something to heal her. The rest of the group would also form a protective circle around her, making sure no further harm comes to her while they figure out how to treat her wounds.