Create a complex backstory for both the girl and the captors. Maybe the girl is involved in something she didn't know was dangerous, which led to her being captured. And the captors could have a long - standing feud or a specific mission related to her. By exploring these backstories, it will add depth to the situation and make the whole theme of her being restrained more engaging for the readers.
You can add a lot of mystery. For example, the captors could be wearing masks and not revealing their identities or motives at first. This will keep the readers guessing and make them more interested.
Introduce some unique abilities or powers for the girl. If she has some kind of special power that she can use to fight back against the captors, it will make the story more exciting. For instance, she could have the power of telepathy and use it to communicate with someone outside for help. Also, detailed descriptions of the struggle between the girl and the captors, like the emotions they both feel, the physical and mental efforts they put in, can make the theme more engaging.
One possible plot development could be that the girl manages to break free from the captors and then sets out to expose their wrongdoings. Maybe she has some hidden strength or knowledge that helps her in this escape.
Adding mystery elements can make it more engaging. For instance, not revealing right away why the girl is shrinking. Also, creating complex characters around her like a mischievous gnome who might help or hinder her journey.
Involving other characters in an interesting way can make it more engaging. Maybe there's a character who is trying to understand what the baby is experiencing during hypnosis. They could be an older sibling or a parent. Their reactions and attempts to communicate with the baby can add depth to the story. Also, creating a sense of mystery around the hypnosis itself, like not revealing all at once why the baby was hypnotized or what the full extent of its effects are, can keep the readers hooked.
Adding a lot of vivid descriptions. For example, if the story is set in a forest, describe the lush greenery, the sounds of the animals, and the smell of the damp earth. This makes the setting more real for the readers.
Adding vivid descriptions of the emotions involved can make it more engaging. For example, describe the mother's fear, the father's anxiety.
To make a 'Naruto is heartbroken' fanfiction more engaging, focus on his emotions deeply. Describe how his heartbreak affects his daily life, like he might stop eating or training. Also, add some flashbacks to happier times to contrast with his current state.
By developing strong characters. Make Gamzee's character multi - dimensional, with his own hopes, fears and quirks. Also, create interesting antagonists if there are any involved in the abuse situation.
Educating the fanfic writers and readers is also crucial. By making them aware of the ethical and social implications of certain themes, they can make more informed decisions. For example, workshops or discussions within the fan community about healthy relationships and respectful portrayal of all genders can help in ensuring proper handling of such themes.
One way is to focus on the psychological aspect. Instead of physical violence, the story could be about the girl outsmarting her captors through her wits. For example, she could use her knowledge of human behavior to manipulate them into releasing her.
One way could be to change the situation to a consensual medical sedation for a valid medical reason. For example, if the girl is injured and needs medical treatment, and she consents to being sedated in a proper medical setting.