If Kaneki's kagune (from Tokyo Ghoul) were to interact with the Death Note's power, it would be a strange combination. Kaneki's physical strength as a ghoul could be enhanced further if he could use the Death Note to eliminate threats without direct combat. However, his moral code might prevent him from using it easily. For Light, his power over life and death with the Death Note would be a huge advantage in the Tokyo Ghoul world. He could easily target ghouls that oppose him, but he might underestimate the physical capabilities of some of the stronger ghouls.
The power of the Death Note is mainly about causing death at a distance through writing names. In contrast, the powers in Tokyo Ghoul are more physical and related to combat and survival. But if, say, Near from Death Note were to enter the Tokyo Ghoul world, his strategic mind could use the Death Note in ways that the ghouls might not expect. He could set up elaborate traps where he uses the Death Note to eliminate key opponents while the ghouls are distracted by their own battles. And the ghouls' ability to hide their true identities from humans could be a challenge for those who rely on the Death Note to target them.
Well, in a Tokyo Ghoul x Death Note fanfiction, we could see Ryuk, the Shinigami from Death Note, taking an interest in the ghouls. He might see them as an oddity in the human world and start observing them. This could lead to him interacting with ghouls like Touka. She could be both fascinated and terrified of Ryuk. And if L from Death Note were to enter the Tokyo Ghoul universe, his brilliant detective skills would be put to the test in trying to figure out the ghouls' true nature and how their society functions. He might even form an alliance with some of the more 'human - friendly' ghouls to combat the more violent ones.
Well, in this crossover, the Survey Corps members like Armin would be fascinated by the intelligence of some ghouls. They might try to communicate with them to gain knowledge about their powers. Ghouls like Touka would be in a difficult situation. She would be in a world full of titans, which are much larger and more difficult to deal with than the CCG in her own world. She might have to learn new fighting techniques from the Survey Corps. And characters like Erwin would see the ghouls as a valuable asset, trying to recruit them to fight the titans.
The characters would interact in very unique ways. For example, Harry Potter might be initially cautious around the ghouls from Tokyo Ghoul. He's used to dealing with Voldemort and his Death Eaters, but ghouls are a completely different type of threat. Ken Kaneki, being a half - ghoul, could teach the wizards about the nature of ghouls, and in return, the wizards could show him some amazing magic spells.
Maybe a Death Note character like Light ends up in the Tokyo Ghoul world. He could see the ghouls as a new type of 'evil' to be eradicated. He'd have to deal with the fact that ghouls are much harder to kill than normal humans. And he might find that his usual methods of staying undetected don't work as well in this new, more dangerous world.
Touka Kirishima could also be a fascinating crossover character. She's a strong - willed and capable ghoul in Tokyo Ghoul. If she got her hands on the Death Note, she might use it to protect her friends and the ghoul community in a more discreet way compared to her usual more direct combat methods. It would show a different side of her character, as she'd have to be more calculating and less impulsive.
The characters would interact in very interesting ways. For instance, Levi from Attack on Titan might be initially suspicious of the ghouls. But once he sees their combat abilities, he could try to recruit them or at least work with them. Kaneki, on the other hand, might be in awe of the Survey Corps' determination. He could learn a lot from their teamwork and discipline. And the ghouls' concept of a 'family' within Anteiku could be something that the soldiers of the Survey Corps might find strange but also endearing.
The Jedi would likely approach the ghouls with caution at first. They would try to understand their nature and see if there's a way to coexist. For example, Obi - Wan Kenobi might try to negotiate with the ghoul leaders. The Sith, on the other hand, might see the ghouls as potential minions or tools. Darth Maul could try to use the chaos of the Tokyo Ghoul world to his advantage.
Superman has super strength, flight, heat vision, etc. X - 23 has enhanced strength, speed, and her claws. If they were in a fight together, Superman could use his flight to gain an aerial advantage and X - 23 could use her speed to quickly move around on the ground. His heat vision could be used to blast enemies from a distance while she could use her claws for close - combat.
Batman would likely be very suspicious of Light Yagami. Light sees himself as a kind of 'god' when he has the Death Note, but Batman, who is all about justice in a more traditional sense, would not tolerate Light's actions. He would probably try to stop Light from using the Death Note. As for L, they might initially be at odds as they both are brilliant detectives, but they could end up working together to stop the misuse of the Death Note.
Well, Naruto's Rasengan, a concentrated ball of chakra, could be infused with the energy of one of Ben's alien forms. Let's say Big Chill. The combination could result in a freezing - chakra attack that not only freezes opponents but also has the impact force of the Rasengan. When it comes to Gwen, her mana could interact with Naruto's Sage Mode. In Sage Mode, Naruto is more attuned to nature. Gwen's mana, which has its own connection to magical elements, could enhance Naruto's connection to nature even further, allowing him to access more powerful Sage Mode techniques. Ben's aliens like Diamondhead could be used to protect Naruto and Gwen during battles, and Naruto could use his teleportation jutsu to quickly move Ben's aliens into strategic positions.