One possible reason could be Loki's sense of isolation. In many Avengers fanfictions, Loki is often portrayed as an outsider. He may cry out of loneliness, feeling that he doesn't truly belong anywhere, not even among his own kind. Another reason might be regret. Loki has done a lot of wrongdoings in the stories, and he could be crying over the consequences of his actions, like the harm he has caused to Thor or the people of Asgard.
There are also fanfictions where the crying is related to emotional revelations. Say, Thor discovers a long - hidden truth about his family that makes him cry. This can be a really engaging plot in fanfiction. Writers might explore the other Avengers' reactions to his pain, like how Iron Man tries to comfort him with his typical sarcastic yet caring way.
Build up the tension before the crying moment. If it's about the Avengers losing a battle, show the gradual defeat, the injuries piling up. Then, when the crying starts, let it be a release of all that pent - up emotion. Also, consider the relationships between the characters. A scene where Iron Man cries because of something Captain America said would be different if they had a closer or more strained relationship at that point in the story.
Loki's crying can be a turning point in the plot. It might make other characters see him in a different light. For instance, if the Avengers see Loki crying, they might start to question their assumptions about him being purely evil. This can lead to a change in their relationship with him, like they may offer him a chance at redemption.
Sakura could be the one to find him crying. She has known Naruto for a long time and they are comrades. If Naruto is in a vulnerable state, she might stumble upon him.
One possible reason could be that he is lonely. In many fanfictions, Naruto is often ostracized as a baby due to the Nine - Tails inside him. He might be crying because he feels the lack of a warm, loving presence around him.
They can describe his physical reactions. For instance, 'Merlin's shoulders shook as he sobbed, his hands covering his face as hot tears streamed through his fingers.' This gives a vivid picture of his crying.
It could be the result of Naruto's own inner demons. Maybe he discovers some dark secret about his past, like his parents being involved in something he can't accept. This self - realization could be so traumatic that it makes him cry blood as he struggles to come to terms with it.
Perhaps he's had a falling - out with his friends. In the Slytherin house, there could be a lot of power dynamics and rivalries. If he's been betrayed by someone he thought was a friend, it would be very upsetting.
The three Avengers could be Iron Man, Captain America and Thor. Iron Man could provide the high - tech gadgets and strategic thinking. Captain America would bring leadership and his combat skills. Thor with his godly powers like lightning and super strength would be a great addition. They would each have different interactions with Spiderman, for example, Iron Man might be like a mentor to him, while Thor could be more of a friendly rival in terms of strength.