In a crossover with 'Sailor Moon', Sailor Mars would be a great character for kagome to interact with. They both have powers related to spiritual energy and fire. They could learn from each other's combat styles and magical abilities, and perhaps team up to fight a common enemy that threatens both their worlds.
The characters would interact in some really interesting ways. Kagome, being from a more traditional and magical world, would bring a sense of wonder to the Lab Rats. She could show them her techniques for fighting demons, like her acrobatic moves and her use of the sacred arrows. The Lab Rats would share their high - tech gadgets with her. For instance, they could let her try out their super - speed or super - strength enhancements. There would be some cultural clashes too. Kagome's more formal and respectful way of speaking compared to the modern and sometimes sarcastic speech of the Lab Rats would lead to some humorous exchanges.
It's hard to say. Ainz Ooal Gown has a vast array of powerful magic spells at his disposal. However, Ben when he transforms into Alien X could be extremely powerful as well. Alien X has reality - warping abilities. But Ainz has his intelligence and strategic thinking. So it could really go either way depending on the situation.
Kagome is also a great choice. Her knowledge of the feudal era and her spiritual powers would make her stand out in Haruhi's world. She could be the one to introduce a sense of mystery and ancient wisdom to the modern and often zany world of the SOS Brigade. Also, seeing how she adapts to Haruhi's world and tries to find a way back to her own while dealing with Haruhi's wild ideas would be really engaging.
Superman would be really interesting. Their powers are quite different. Superman is an alien with a wide range of powers like flight, super - strength, heat vision etc. The Hulk, on the other hand, is a being of pure rage with ever - increasing strength. Their encounter could be a clash of ideologies as well. Superman stands for truth, justice and the American way, while the Hulk is often just a force of destruction when enraged. It would be fascinating to see how Superman tries to calm the Hulk down or how the Hulk reacts to Superman's attempts at peacekeeping.
Tsunade could interact with Midoriya Izuku. Izuku is always eager to learn new things and improve his skills. Tsunade could see his determination and potential, and she might teach him some of her combat and medical knowledge. Maybe she would help him control his quirk better or give him some physical training tips.
The Phantom himself could be an interesting pairing. Their different backgrounds and personalities would create a lot of drama and potential for character growth. The Phantom's dark and brooding nature could be contrasted with Kagome's more positive and empathetic self.
I think Kagome and Kyon would have some interesting exchanges. Kyon is the voice of reason in the SOS Brigade, and Kagome coming from a different world with different rules would challenge his view of things. He might be skeptical of her at first, but as they interact more, he'd start to see that there's more to her world than he thought. And Kagome would be intrigued by Kyon's sarcastic yet practical nature.
Superman would be really interesting. Ichigo, coming from a world of spiritual powers, would be in awe of Superman's physical strength. And Superman would be curious about Ichigo's ability to see and interact with souls. Their different power sets and moral compasses could lead to some great character - building moments. For example, Ichigo might learn about the importance of using power responsibly in a more global sense from Superman.
Natsu would be a likely candidate. He's always up for a challenge and not afraid to take on powerful opponents. He'd probably be the first to rush towards Godzilla, either to fight it or try to befriend it in his own Natsu - like way.
When Kagome meets Hinata, she could see Hinata's shyness and determination to become stronger. Kagome would probably encourage her. And with Sakura, they could have an interesting relationship. Kagome might teach Sakura some new ways of using energy for healing, while Sakura could show Kagome the more scientific aspects of the ninja medical field. Also, Kagome would be curious about the various jutsus that all the characters possess and would likely ask a lot of questions.