Korra would likely be very cautious at first. She's used to dealing with powerful opponents, but Hollow Ichigo's otherworldly nature would be something new. She might try to communicate with him, but if he showed aggression, she'd be ready to fight. Asami would probably be more strategic, trying to figure out his weaknesses. Mako and Bolin would be a bit more intimidated. Mako might use his lightning - bending as a first line of defense, while Bolin would be thinking of ways to use his earth - bending to either trap or slow down Hollow Ichigo.
The villains in Legend of Korra, like Amon or Zaheer, would view Hollow Ichigo as either a tool or a rival. Amon might think he could use Hollow Ichigo's power to further his anti - bender cause, but he'd soon realize that Hollow Ichigo is uncontrollable. Zaheer, on the other hand, might see Hollow Ichigo as a challenge to his ideology of freedom. He might try to engage in philosophical debates with Hollow Ichigo while also being ready to fight if necessary.
Ichigo's Soul Reaper powers are based on spiritual energy, and Korra's bending is based on her connection to the elements. Their powers could interact in a way that creates a new form of energy. For example, when Ichigo uses his Getsuga Tenshou near Korra while she's bending, it might create a shockwave that combines the force of the spiritual energy blast with the element she's bending. This could be a very powerful and unique combination that they could use to defeat enemies.
A crossover might involve Hollow Ichigo being drawn to the Avatar state. He could sense the immense power within Korra when she enters the Avatar state and be both intrigued and threatened by it. This could lead to a series of battles and power struggles. Or perhaps some of the villains in Legend of Korra might try to team up with Hollow Ichigo, thinking his power could help them achieve their goals, but in reality, he has his own agenda and would double - cross them at the first opportunity.
Some of them might be excited. They could see new ideas and interpretations of their world that they hadn't thought of before. For instance, if there are new bending techniques in the fanfiction, the benders in the gaang might be eager to try them out in their imagination. Others might be more critical and point out inaccuracies compared to their real - life experiences in the Avatar world.
The characters in DxD would be quite shocked at first. Ichigo's appearance and his powers are so different from what they are used to. For example, Rias Gremory would probably be intrigued by Ichigo. She might try to form an alliance with him, seeing his potential as a powerful ally. Issei, being the main character in DxD, would likely be both jealous and in awe of Ichigo's abilities, and might challenge him at first but then learn from him over time.
At first, Hollow Ichigo's interactions with the Justice League would be full of tension. His wild and untamed nature would contrast with the more organized and moral - centered League. Superman would try to talk to him, but Hollow Ichigo might not listen. Batman would be devising plans to either contain or neutralize him. However, if there's a common enemy, like a powerful interdimensional being that threatens both Hollow Ichigo's world and the DC universe, things could change. Hollow Ichigo might start to respect the League's skills and powers. He could form an uneasy alliance with some members. For example, he might find himself fighting side - by - side with Green Lantern against the enemy's energy - based attacks. The League would also start to see Hollow Ichigo in a new light, not just as a brute force but as a valuable ally with unique abilities.
At the start, Ichigo would be defiant. He would not show any fear in front of Aizen. He might taunt Aizen, trying to get him to reveal his true intentions. As time goes on, he would start to feel a sense of isolation, but this would only strengthen his resolve. He would use his inner Hollow powers more freely, as he has no other option. He would also be constantly thinking about ways to turn the tables on Aizen and escape, and would be ready to take on any challenges that come his way during his captivity.
In a fanfiction, characters like Asami from Legend of Korra and Sasuke from Naruto could also interact. Asami might be intrigued by Sasuke's cool and brooding demeanor. Sasuke, in turn, could respect Asami's intelligence and engineering skills. Their interactions could add another layer of complexity to the story, as they come from very different backgrounds yet find common ground in their loyalty to their respective friends and the greater good.
Rukia would probably be both amazed and a bit worried. Amazed at the new power Ichigo has, but worried about how it might change him. Chad would see it as a natural progression of Ichigo's power and be supportive. Orihime might be a bit scared at first, but then she would see the good in Ichigo's new form and try to encourage him.
Ichigo would likely be defiant. He's a fighter and would not easily submit to Aizen. He'd probably be constantly looking for a way to escape and would be sizing up Aizen's every move, trying to find a weakness.
Well, Naruto's shadow clone jutsu could be combined with Korra's earthbending. The clones could be made out of earth, allowing for a whole new type of combat strategy. They could be used to distract opponents while Korra attacks from another angle.