A third scenario could be related to soul - eating itself. In some fanfiction, a character might be forced to consume a corrupted or poisoned soul. This could have a negative impact on their own soul. For instance, if Black Star were tricked into eating a soul that was filled with dark magic, it could start to infect his soul, causing it to feel pain and gradually lose its strength as the dark magic spreads.
Another scenario could involve soul resonance gone wrong. In the 'Soul Eater' world, soul resonance is crucial. In fanfiction, perhaps two characters attempt a very powerful and untested form of soul resonance. But due to a lack of proper understanding or some external interference, it backfires. This could lead to the souls of the characters involved getting hurt. Like if Soul and Maka tried a new level of resonance without fully preparing, their souls might experience a shock that causes internal pain and disrupts their connection.
Meditation and self - reflection can also be a method. The character with the hurt soul could go into a deep meditative state, similar to how some characters in the original 'Soul Eater' series train. By reflecting on their inner self, they might be able to identify the source of the soul's pain and start to repair it. For instance, Stein could use his knowledge of the soul to guide a character in this self - reflection process.
One idea could be that Soul's sickness is caused by an unbalanced resonance with Maka. Maybe they've been overusing their Soul Resonance in battles and it's taking a toll on Soul. Another idea is that an enemy has cursed Soul, making him sick in a way that weakens his combat abilities and his connection to his weapon form. For example, the curse could make it painful for him to transform.
The plot could start with Soul suddenly falling ill during a battle or in the middle of a normal day at the academy. His sickness could cause chaos as their team's performance in combat and missions is affected. Maka might then start to investigate the cause on her own, leading her to discover secrets about Soul's past or the nature of their Soul Resonance that she didn't know before.
In some 'goku gets hurt fanfiction', he might get hurt while protecting his friends or family. For example, he could take a fatal blow meant for someone else. This would not only physically harm him but also add an emotional aspect to the story as his loved ones would be worried and try to save him.
Maybe Harley could get hurt during a fight with a supervillain. For example, she might be outnumbered and take a hard blow.
In this type of fanfiction, Kagami could get hurt in a more domestic setting as well. Say she's helping out in the kitchen and accidentally cuts herself with a sharp knife. Or she could be climbing stairs at home and slip, falling and getting hurt. There could also be an emotional hurt scenario where she overhears something unkind about herself and is deeply hurt on an emotional level which could also be explored in the fanfiction.
One scenario could be that Steven is exploring an unknown area and stumbles upon some sort of dangerous trap that causes him harm. It could be a hidden energy field or a collapsing structure. Another possibility is that he gets hurt while trying to protect his friends. He might jump in front of an attack meant for someone else, like Connie or the Crystal Gems, and bear the brunt of the injury.
Perhaps in the 'lydia gets hurt fanfiction', Lydia is hurt while exploring a dangerous and unknown place. She could step on a hidden trap, like a spike pit or a poisoned dart trap, which causes her physical harm and then she has to struggle to survive and find help in that hostile environment.
In 'kuroko gets hurt fanfiction', he could be injured in a fight. For example, if some rivals from another school pick a fight with him because of his basketball skills. Also, perhaps while training alone at night, he overexerts himself and pulls a muscle. It's also possible that in the story, he gets hurt trying to protect one of his teammates from a bully.
Another possibility is that she gets hurt emotionally. Maybe a relationship in the fanfiction turns sour. A betrayal by a close friend or a lover could be considered as a form of 'getting hurt'. This could then lead to her making some different choices in the story and growing as a character from the pain she experiences.