Sure, it's possible. Naruto has his own set of powers and a strong sense of justice. In the fanfiction world, he could see Tenten in trouble and decide to act. He might not fully understand the concept of gay fanfiction, but he doesn't need to. All he needs to do is recognize that Tenten is in a bad situation and use his abilities like the Rasengan or his ability to make friends and allies to get her out of it. It would be like one of his normal rescue missions, just in a different setting.
Luffy will most likely use his Gum - Gum abilities. He could stretch his arms to grab Nami and pull her away from the abuser quickly. For example, he might use Gum - Gum Pistol to knock out the bad guys who are abusing Nami.
Maybe Rock Lee could be an important character. He could come to the orphanage to help with the physical training of the orphans. He would be a great inspiration for them with his hard - working attitude. Also, Neji could be involved. He could use his Byakugan to keep an eye on the orphanage and make sure there are no threats approaching.
Well, it could be that Naruto stumbles upon a strange situation in the fanfiction world where Tenten is in some sort of distress related to the gay fanfiction plot. Maybe he uses his ninja skills to disrupt the flow of the fanfiction and rescue her. He could use his shadow clone jutsu to create distractions and then whisk Tenten away to safety.
It could be that Might Guy is under some sort of mind - control. So, without his normal self - control, he attacks Tenten, making it necessary for Naruto to save her.
Well, in a 'naruto and tenten family fanfiction', their children would play a big role. Let's say they have a son and a daughter. The son is very much into his father Naruto's Rasengan technique and is constantly trying to improve it. The daughter, on the other hand, is more interested in her mother Tenten's ranged weapon attacks. There could also be a neighbor, an elderly ninja who has a lot of stories to tell. This neighbor could be a source of wisdom for the family, especially for the children as they grow up and face different challenges in the ninja world.
This theme can be seen as a way to humanize Naruto even more. By having him be abused in fanfiction, it shows that he's not invincible and has to face hardships even within his own village. It also might be used to critique the society in Konoha, like how they treated Naruto as an outcast because of the Nine - Tails. In some fanfictions, this abuse could lead to Naruto taking a different path in his development compared to the original story.
Well, in many fanfictions, Naruto might use his signature jutsus like the Rasengan. He could sense the danger the woman is in using his enhanced ninja senses and then quickly dash in to counter Rizevim's attack with his powerful moves, overpowering Rizevim and rescuing the woman.
Well, Naruto is known for his quick thinking. So perhaps he quickly assesses the situation and uses the surrounding environment to his advantage. For example, if there's a water source nearby, he could use his water jutsu skills (if he has them in that fanfiction) to counter the fireball and save Ami. Or he might even use his body as a shield if it comes down to it, relying on his Uzumaki durability.