One way is through his actions. If Naruto has dull eyes, he might move more slowly, without his usual enthusiasm. For instance, instead of bounding around with excitement, he'd just trudge along. His reactions to things would also be muted. When his friends greet him, instead of a big smile, he might just give a half - hearted nod.
The writer can use descriptions of his appearance in relation to his eyes. They could say that his once - bright blue eyes now seem clouded over, like a stormy sky has moved in. And when it comes to his facial expressions, his brows might be slightly furrowed, as if he's constantly in a state of mild confusion or sadness because of whatever has caused his eyes to become dull.
A good way would be to contrast his current state with his past self. Recall how Naruto was always eager to prove himself, always looking forward with bright eyes. Now, with dull eyes, he might avoid looking people in the eye. He may not be as quick to jump into a fight or a challenge. The writer can show how this change in his eyes reflects a deeper change in his very being.
A writer can start by changing his normal reactions. Naruto usually jumps into action with enthusiasm. But when he's broken, he hesitates. He might be afraid of making decisions. The writer can also use flashbacks to show what led to his current state. Maybe a tragic event that keeps replaying in his mind. And don't forget to show his internal monologue. Let the readers hear his self - loathing and despair.
The writer can focus on Naruto's emotions. Show his shock and disbelief when the hurt occurs. For example, if Sasuke attacks him, describe how Naruto's eyes widen in horror, unable to believe that his friend would do such a thing. Use internal monologue to let the readers know how broken Naruto feels inside. Another way is to show the physical pain in detail, like if Sakura uses her medical skills to harm rather than heal Naruto, describe the pain as it courses through his body.
To effectively portray Batman crying, the writer should consider the context that leads to it. If it's due to a loss, describe the build - up of emotions before the break. Maybe he tries to hold it in at first, his jaw clenched and his eyes blinking rapidly to keep the tears at bay. But then something small, like a memory or a memento related to what he lost, shatters his resolve. The writer can also use the reactions of other characters around him. If Alfred is there, his look of concern and sadness can further emphasize Batman's emotional state.
By showing his lack of reaction to things around him. Normally, Naruto is full of energy and reacts strongly to various situations. But if he has no life in his eyes, he might just stare blankly at things. For example, when his friends are talking to him or when there is an exciting event in the village, he shows no interest or emotion, as if he is just an empty shell.
Show his internal thoughts. Let the readers see what he's really thinking and how it differs from what others think of him. For example, when he's creating a new piece of tech, have him worry about how it will be misused even though others might assume he's just doing it for fun.
The writer can use descriptive language. For example, describe Aang's facial expressions like 'Aang's eyes, usually full of life and hope, were now dull and filled with sorrow. His lips quivered as he tried to hold back his tears.' Also, show his body language such as slumping shoulders and a slow, heavy gait. Another way is through his actions. He might withdraw from his friends, spending more time alone meditating or just sitting quietly, lost in his thoughts.
A writer can use vivid descriptions of Sasuke's physical state. For example, describe his trembling lips, his eyes welling up with tears that he tries to hold back at first but eventually can't. Also, show his internal struggle through his thoughts, like how he feels ashamed to cry but the love for Sakura is too strong.
The writer can describe her physical pain in detail. For example, if she has a wound on her side, describe how it throbs and limits her movement. This makes the injury seem real.
The writer can describe her physical state in detail. For example, if she has a cut on her arm, describe the blood seeping out, the pain she feels as it stings. Also, show her reaction to the injury, like her trying to hide it if she doesn't want to show weakness.
Show his confusion at first. Naruto might not understand why he was abandoned or betrayed. He could have a lot of questions like 'What did I do wrong?' Writers can use his internal monologues to convey this. For example, 'Why did they leave me? I thought we were friends.'