In my opinion, Kakashi would be a great choice. He's a very experienced and intelligent character. In a Monster Hunter crossover, he could use his vast knowledge of combat and strategy to quickly adapt to the new environment. His Sharingan would also be useful for observing the monsters. And his laid - back yet reliable personality would lead to some interesting interactions with the Monster Hunter characters, and he could even teach them some of his ninja skills.
I think Sasuke would be very interesting. His brooding and powerful nature would contrast well with the Monster Hunter setting. He would be highly focused on defeating the monsters and might be intrigued by the different types of power they possess. His Sharingan could give him an edge in analyzing the monsters' movements and attacks, and he could potentially learn new ways to enhance his own powers from the Monster Hunter experience.
I think Blake would also be a great focus. Her stealth and agility would translate well in the Monster Hunter world. Plus, her cat - like Faunus traits could give her an edge in certain situations, like tracking or sneaking up on monsters.
It's hard to say for sure, but Naruto could be a very strong contender. His ability to create countless clones and his massive chakra reserves would give him an edge. Plus, his Sage Mode and later forms are extremely powerful. However, Ging from Hunter x Hunter also has a lot of mystery and power surrounding him. He might be able to outwit Naruto in a battle of wits. But then again, Sasuke with his Rinnegan and Sharingan abilities could also be very formidable in this crossover.
Leorio and Yang would be quite a combination. Leorio's medical knowledge could be useful when Yang gets injured in battle. And Yang's brash and energetic personality could pull Leorio out of his more serious and studious mode. They could also have some funny exchanges about money and values, as Leorio is often concerned about finances while Yang is more about the thrill of the fight.
I think Killua and Ziva would make a great pair. Killua has his assassin background and lightning - fast reflexes, and Ziva is a former Mossad agent with her own set of combat and investigative skills. They could have some great action scenes together and also share their experiences of growing up in a world of danger and secrecy.
Definitely Gaara. His ability to control sand is unique. In the Borderlands 2 setting, he could use his sand to protect his teammates from the various attacks, like from the psychos or the Loader Bots. His transformation into Shukaku could also be a very powerful and visually striking element in the crossover.
I think Gintoki would be the most interesting. His laid - back and cynical nature would contrast so much with the more idealistic Naruto. He would constantly be making sarcastic remarks about Naruto's ninja -isms and the whole concept of being a hero. But at the same time, he would also be secretly impressed by Naruto's unwavering determination. And seeing Gintoki try to use Naruto's ninja tools or techniques in his own wacky way would be really entertaining.
Naruto would be really interesting. His never - give - up attitude would make him stand out in the spooky FNAF world. He'd probably be the one to charge headfirst into danger, whether it's facing the creepy animatronics or trying to solve the mysteries of the place. He could also try to befriend the animatronics if he thought they were being controlled against their will, just like he did with some of his enemies in the Naruto world.
It could be Ben himself. Imagine him using his alien forms in the Naruto universe. His Heatblast form could be really useful against ice - based jutsu, and Four Arms could take on some of the physically strong ninja. He would bring a whole new element of power and chaos to the Naruto world, and his reactions to the different cultures and powers in Naruto's world would be interesting to explore.
Sasuke could be really engaging in this scenario. His cold and calculating nature would be a contrast to the chaos of the zombies. He might see the zombie outbreak as an opportunity to gain more power or find a way to use the situation to his advantage against his enemies in the Naruto world. And his Sharingan could potentially have some new abilities when dealing with the undead.
Sasuke could be a very interesting character in this crossover. He has his own dark and brooding nature. He might be more interested in the stronger and rarer Pokemon. His sharingan could give him an edge in understanding Pokemon's abilities and behaviors. He could also train Pokemon in a more intense and strict way compared to other trainers.