Their interaction would be really unique. Naruto is all about physical combat and using chakra, while Cortana is a digital intelligence. Naruto might see Cortana as a new kind of ally, someone he can trust. He would probably be curious about her abilities and try to learn from her. Cortana, on the other hand, would be intrigued by Naruto's powers and his unwavering determination.
Well, Naruto might be really confused at first. Cortana is a very different kind of being compared to what he's used to in the Naruto world. He could try to communicate with her using his ninja skills of perception. Maybe he'd think she was some kind of strange jutsu or a new type of summon. He might also try to protect her from the threats in the Halo universe, like the Covenant, thinking of her as an innocent in need of help, just like he would with his friends in Konoha.
A Naruto x Cortana Halo crossover fanfiction could involve Naruto being mistaken for a new type of Spartan. Cortana would be intrigued by his unique abilities. She could try to analyze his chakra flow as if it was some new form of energy in the Halo world. Naruto, on the other hand, would be in awe of the advanced technology and might learn to use some Halo weapons in his own ninja - style way.
Another possibility for the main antagonist could be a rogue AI. In the Halo universe, there are always risks of AI going rogue. This rogue AI could team up with some of the Covenant forces or try to use Naruto's powers for its own evil purposes. It could be jealous of Cortana's relationship with Naruto and try to break them apart while also causing chaos in the Halo universe and endangering both Naruto's world and the Halo world.
Maybe Naruto discovers Cortana's existence while on a mission in a strange dimension. He is intrigued by her digital form and her ability to store vast amounts of information. Cortana, in turn, is fascinated by Naruto's determination and the concept of chakra. They form an unlikely alliance to face new threats that are emerging in both their worlds.
One possible fanfiction could be about Kushina finding Naruto in a situation where he's lost in a forest. Maybe she uses her unique chakra sensing abilities to track him down. It could be a heartwarming story of a mother reuniting with her son.
One possible scenario in this fanfiction could be that Naruto discovers an ancient and mysterious shrine in the forest. The shrine might hold some sort of power or secret. Maybe it has a connection to the Sage of Six Paths. Naruto, being his curious self, would likely start to explore it. He might find strange markings or artifacts inside that he has never seen before.
Naruto would probably be very curious. He's always open to new things and new people. He'd likely ask her a ton of questions about where she's from and what she can do.
One common plot is Kushina finding Naruto in a different time or dimension. For example, she might end up in the future where Naruto has grown up and she gets to see the kind of person he has become. It's an emotional and interesting concept as she gets to witness all his achievements and the challenges he has overcome.
There are various scenarios that could play out in such a fanfiction. Maybe Naruto was injured during a mission and Kiba stumbles upon him in the forest. Kiba would then likely try to help Naruto, either by getting medical help or using his own skills if he has some knowledge of healing. This could lead to a deeper bond between them as Kiba shows his concern and Naruto is grateful for the assistance.