One common theme is Hinata's understanding of Naruto's loneliness. Since Naruto has often been alone in his life, Hinata's presence to comfort him fills that void. For example, in many fics, she simply sits and listens to him talk about his problems.
Often, Naruto would use his own experiences to comfort Hinata. He has faced so much rejection and loneliness in his life. So, he might share those stories with her, like how he was always the outcast in the village at first. He'd say something like 'I know how it feels to be alone, but look at me now. And you're so much stronger than I was, Hinata.'
There's a great fanfiction called 'Comfort in Her Arms'. It shows Hinata being very perceptive of Naruto's inner turmoil and she hugs him tightly, providing the comfort he desperately needs. This fic really delves into their relationship and how Hinata's gentle nature can soothe Naruto's troubled soul. She also makes him his favorite food to cheer him up.
Naruto has a big heart, so when it comes to comforting Yugao in the fanfiction, he may use his positive energy. He could offer her a friendly smile, a warm hug, and tell her that she's not alone. Naruto is known for his ability to connect with people on an emotional level, and he would likely bring that out when consoling Yugao. Maybe he'd take her to Ichiraku Ramen to cheer her up, a place that always seems to lift his own spirits.
Well, it could be about Kurenai providing emotional support to Naruto. Maybe Naruto is going through a tough time, like feeling lonely or facing difficulties in his training, and Kurenai steps in to comfort him with kind words and advice.
Often, Kakashi gives Naruto pep talks. He might say things like 'Naruto, you're a special shinobi. Don't let setbacks hold you back.' This simple yet effective way can cheer Naruto up.
In the fanfiction, Naruto might comfort Temari by simply being there for her. He could offer her a friendly shoulder to lean on and listen to her problems without judgment.
One scenario could be when Gaara is having nightmares about his past. Naruto shows up at his bedside and sits with him. He tells Gaara that he too used to have bad dreams but he learned to face his fears. Naruto then holds Gaara's hand and stays with him until he falls asleep again. Another scenario is when Gaara is feeling left out during a shinobi gathering. Naruto notices and drags him into the middle of the group, introducing him to everyone and saying how cool Gaara is. This makes Gaara feel more welcome.
Obviously, Naruto and Kurenai are the main characters. Naruto is the protagonist of the Naruto series, known for his energetic and determined personality. Kurenai, on the other hand, is a skilled kunoichi with a calm and understanding demeanor.
Another theme is redemption. Konan may be feeling guilty about her past actions, and Naruto helps her see that she can be redeemed. He might say things like 'Your past doesn't define you. You can create a better future.' It's about giving her hope and a new perspective.