The theme of self - doubt is quite common too. Riley might be hurt by her own insecurities, believing she's not good enough. This could be in relation to her appearance, her abilities, or her place in her social circle. And sometimes, she could be physically hurt in a situation that then leads to her dealing with the emotional aftermath, such as getting injured during a sports event and then struggling with feelings of inadequacy because of it.
I'm not sure of specific Riley Matthews hurt fanfictions off the top of my head. But you can try searching on fanfiction platforms like Archive of Our Own or FanFiction.net. Just type in 'Riley Matthews Hurt' in their search bars and you should get a list of relevant stories.
The theme of friendship is also crucial. Her friends' reactions to her depression can vary. Some might be very understanding right away, while others may struggle to deal with it. There could be a lot of tension in the group as they try to figure out how to help Riley. Also, the theme of family support or lack thereof can be explored. Her parents might be in denial at first or not know how to approach the situation.
One possible good fanfiction could be 'Riley's Struggle with Depression'. It might explore how Riley, in the context of her character, deals with the daily challenges of depression. It could show her friends and family trying to support her, like Maya being there for her in tough times.
Macgyver would probably be very worried. He'd quickly assess the situation and try to stop the bleeding if she was bleeding. He'd use his resourcefulness to make a makeshift stretcher or bandage.
In a fanfiction, when Riley is hurt, it could lead to an emotional turmoil within the team. His friends would be worried about him. They might also start to question their safety and the risks they take. Maybe some of them become overprotective, which could cause some internal conflicts in the team. For example, one Ranger might want to keep Riley out of future battles even when he recovers, while Riley himself is eager to get back in action.
One common scenario could be during a mission. Maybe she gets caught in an explosion while trying to defuse a bomb. Another might be getting shot while providing cover for Macgyver. Or she could be injured in a fight with the bad guys when they manage to overpower her briefly.
The team would likely be very concerned. Ben, being the leader - type, would probably take charge of the situation. He'd try to assess the severity of Riley's injury right away.
Well, perhaps the other characters would immediately rush to his aid. They might use their knowledge of history and ancient remedies to try and heal him. For example, Ben could recall some medical knowledge from an old manuscript they once found during one of their adventures.
In a possible fanfiction scenario, Riley could be hurt during a battle with a new and powerful enemy. Maybe the enemy has a weapon that can penetrate the Dino Charge Rangers' defenses. Riley, being brave, might take a hit while trying to protect his teammates.