Well, she might be a civilian who accidentally stumbled upon the wrong place and was captured by some rogue ninjas using the lab as a hideout. Another possibility is that she is related to one of the main characters in the Naruto universe. For example, she could be a long - lost sister of Sasuke or Naruto. It would add an interesting twist to the story. She could also be an undercover agent from another village who was discovered and chained up in the lab.
There are several possibilities for the identity of the female. She could be a victim of a secret organization within the Naruto world that conducts inhumane experiments. This organization might be trying to create super - soldiers or something similar. Or perhaps she was a spy from an enemy village who was caught while trying to steal some important information from the lab. It's also possible that she is a character from Naruto's past that he doesn't remember, and her being chained in the lab is part of a larger conspiracy to bring some sort of chaos to the ninja world.
Well, Naruto would probably immediately try to free her. He's the kind of person who can't stand seeing someone in distress. He might use his ninja skills to break the chains quietly if he's worried about enemies nearby. Then he'd likely ask her who she is and how she ended up there.
Well, Naruto might first try to free Kaguya. He is a hero after all and doesn't like to see anyone chained unjustly. But he would also be very cautious because Kaguya is extremely powerful and was once a great threat. He could try to communicate with her to understand why she is chained there in the first place.
Naruto would feel a sense of responsibility. He might think that it's his duty to do something about it. He could start by examining the chains to see if there is any way to break them. He would also be on high alert because he doesn't know if this is some sort of trap. He would be thinking about all the possible consequences of his actions and how it could affect the world around him.
The lab could hold secrets about Orochimaru's past. Maybe there are records of his early days as a ninja, his training, and what led him to become so obsessed with immortality. Naruto might stumble upon these records and gain a better understanding of his enemy.
Maybe an evil scientist from the Lab Rats' world who has heard of Naruto's godlike powers and wants to harness them for his own experiments. He could create powerful robotic minions to fight Naruto and the Lab Rats. This scientist could be jealous of the Lab Rats' abilities and see Naruto as a new source of power to take over both worlds.
He might discover some long - lost jutsu. Ancient labs could hold secrets to powerful ninja techniques that have been forgotten over time. Maybe he'll find scrolls with unique chakra - based abilities or old - fashioned weapons with special powers.
It could be about Naruto being in a difficult situation where he is chained to something related to the Whirlpool. Maybe it's a plot device to limit his movement and power in the fan - created story. It might be used to explore his struggle against an enemy or some internal conflict while in this chained state.
It could be Voldemort or one of his Death Eaters. They might chain Draco to use him as a bargaining chip or to force his family to do their bidding. Another possibility is a powerful, dark - minded pure - blood wizard who has a vendetta against the Malfoy family and decides to chain Draco as a form of revenge. Or perhaps a rogue Hogwarts professor who has dabbled too much in the dark arts and sees Draco as a means to an end, chaining him to carry out some dark experiment.
He might discover some new and powerful jutsu hidden there. Maybe it's a lab created by an ancient ninja clan that was lost to history.
The lab might be a place where the secrets of the Sharingan were once studied. Naruto, not having the Sharingan but being a curious kid, might accidentally trigger some kind of device that gives him a temporary insight into the power of the Sharingan. This could lead to some interesting interactions with Sasuke later on. Also, he could meet some old scientist - type characters who were once involved in these studies and they could become his mentors in a way.