Maybe in the fanfiction, Inuyasha and Miroku are in a battle against a powerful new enemy. The enemy has the ability to manipulate the elements. Miroku is hurt when the enemy uses a blast of fire that burns his robes and causes burns on his skin. Inuyasha jumps in to save him but is hit by an ice shard that pierces his side. This sets up a situation where they are both in a weakened state and have to rely on each other and their friends to recover and fight back.
One possible plotline could be that Tohru gets physically hurt during an accident while helping out at the Sohma house. Maybe she's climbing a ladder to fix something on the roof and slips, resulting in a sprained ankle or a cut. Another could be that she gets emotionally hurt when she overhears some of the Sohma family members saying unkind things about her, not realizing she can hear them. It could make her question her place in their lives.
Yuki would likely be very concerned. He has a soft spot for Tohru and would probably rush to her side, trying to find a way to help. He might even blame himself if he thinks he could have prevented it. Kyo, on the other hand, would initially be angry, but that's just his way of showing worry. He would be more hands - on in getting her the help she needs.
There are many fanfictions out there with all kinds of creative and often out - of - the - ordinary concepts. However, this particular idea seems rather unusual and not in line with the traditional characteristics of the Inuyasha series. In the original series, both Koga and Inuyasha are male characters, and pregnancy in a male - male relationship is not a part of the original story's biological framework. But in the world of fanfiction, writers can bend the rules and create unique scenarios, so it's possible that such a fanfiction exists, but it may not be a common or mainstream one.
Physical hurt might come from a powerful magic spell. Let's say an evil sorcerer casts a spell that drains Yami's energy and causes him pain. His struggle to overcome this and regain his strength could be a central part of the fanfiction.
Alex is very likely to be one of the first to help Kara. As her sister, she has a deep bond with Kara and would do anything to protect her. Alex has medical training and combat skills, so she can both treat Kara's injuries and defend her if needed. Another character would be Winn. He is a tech - genius and could use his knowledge to create something to help Kara heal faster or to find a way to counter whatever caused her injury. Also, J'onn J'onzz, with his shape - shifting and telepathic abilities, could be a great asset in protecting Kara while she's injured and in helping her recover mentally as well as physically.
The relationship would likely become more intense. They would have to rely on each other more, and their bond would deepen as they are about to become parents. Inuyasha would probably become more protective of Kagome.
Peter was running through the forest when he suddenly tripped over a hidden root. Pain shot through his ankle as he tumbled to the ground. His friends, who were a little ahead, quickly rushed back to him. 'Peter, are you okay?' one of them asked, concern etched on their faces. Peter winced and tried to stand but couldn't put weight on his injured ankle. They decided to make a makeshift splint using branches and some cloth they had. As they worked on it, Peter gritted his teeth, trying not to cry out from the pain.
Perhaps Sam gets hurt while trying to protect a civilian. He jumps in front of a werewolf's attack meant for someone else. This would show his selfless nature. The local hunters in the area might not trust Sam and Dean at first, but seeing Sam's sacrifice could change their minds, adding an interesting dynamic to the story.
In a fanfiction scenario where Blossom gets hurt in the PPGZ and RRBZ world, there could be many implications. Her injury could make the city more vulnerable as she is one of the main protectors. The other characters would have to deal with their own emotions. Bubbles might be scared and in denial, while Buttercup could be angry and determined to find who's responsible. Meanwhile, the Rowdyruff Boys might see this as an opportunity to prove themselves as more than just villains, perhaps by helping the PPGZ find a cure or a way to heal Blossom.