Kakashi would be a great choice. He's experienced and calm under pressure. His Sharingan could potentially help him understand the strange illusions and threats in Silent Hill. Also, his knowledge of different jutsu and strategies could be used in unique ways to combat the horrors of Silent Hill. He might be more analytical than Naruto or Sasuke in approaching the situation, which could lead to some interesting interactions with the Silent Hill environment and its inhabitants.
Sasuke could also be an interesting crossover character. His brooding nature and his powerful Sharingan abilities might give him an edge in Silent Hill, but at the same time, the emotional turmoil within him could be further exploited by the nightmarish nature of the place. He could have some deep internal battles as he tries to survive and figure out a way out of Silent Hill while also dealing with his own past traumas.
The interaction between Naruto and Boomhauer could be really cool. Boomhauer has his own unique way of talking which Naruto would probably find really strange at first. But as they get to know each other, Naruto might start to understand Boomhauer's wisdom hidden behind his mumbling. And Boomhauer might be impressed by Naruto's loyalty and determination, which are traits he can respect despite Naruto being from a completely different world.
I think Naruto would be the most interesting. His never - give - up attitude and his ability to make friends easily would make for great interactions in the Danmachi world. His unique ninja skills, like the ability to walk on walls and ceilings, would be quite astonishing to the people in Orario. Also, his powerful jutsu like the Rasengan and the Shadow Clone Jutsu could change the dynamics of combat and dungeon - exploring in Danmachi.
I think Naruto himself would be really interesting. His positive and determined attitude would contrast with the often darker and more complex world of FMA. He could bring his unique brand of ninja spirit and try to make friends with the characters in FMA. His ability to use chakra and his various jutsu would also create some really cool interactions when faced with the alchemists and their powers.
I think Kakashi would be an amazing crossover character. With his Sharingan, he could quickly analyze the threats in the Resident Evil world. His combat skills and intelligence would also be very useful. He could potentially use his jutsu to create diversions or traps for the Resident Evil monsters, and his experience in dealing with various enemies in the Naruto world would give him an edge.
It has to be Naruto himself. His never - give - up attitude and his ability to make friends easily would make him a great addition to the world of Attack on Titan. He could inspire the characters in that world, like Eren, to keep fighting even in the face of despair. Also, his unique powers would be really cool to see against the Titans.
Naruto himself would be a great choice. His sunny personality and strong will would contrast with the more complex and often morally ambiguous characters in Highschool DxD. He could bring a sense of innocence and pure determination to the world of DxD, and his unique jutsu would be a new and exciting addition to the battles there.
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.