Another character Sans could interact with is Akeno. Akeno is known for her dual personality. Sans could have some interesting exchanges with her. Maybe he could sense her hidden side and have some deep conversations about not judging people by their appearance. And their interactions could also involve some light - hearted banter as Sans tries to understand the different types of powers in the DxD world through her.
He might also interact with Rias. Rias is a powerful devil and a leader. Sans could approach her with his laid - back attitude. She might be initially suspicious of him but later come to respect his abilities. They could have some strategic discussions about dealing with common enemies in the High School DxD world. And Sans could probably crack some jokes that would either amuse or baffle Rias.
One possible plot could be Sans getting involved in the supernatural battles in the High School DxD universe. Maybe he uses his unique abilities from his original game to help out the main characters in a fight against a powerful enemy. For example, his bone attacks could be a useful addition to the combat arsenal in that world.
A third storyline could focus on a mystery. There are strange happenings around Sans Seraphim High School, like students disappearing without a trace. The characters from High School DxD start to investigate and uncover a dark secret that has been hidden for a long time, perhaps something related to an ancient evil that is now awakening.
Akeno is another fan - favorite. Her dual nature, being both sweet and somewhat sadistic, can be explored in different ways in fanfiction. At Sans Seraphim High School, she could be involved in a love triangle or be the key to solving a mystery related to the school's dark past.
He might fit in by becoming a teacher or some sort of mentor at the school. Since he has such great power, he could teach the students new ways of using their own powers or just general combat skills. In the process, he'd get involved in all the drama and power struggles within the school, adding a new dynamic to the story. He could also have his own goals and motives that are slowly revealed as the fanfiction progresses.
One common theme is power dynamics. Since 'godlike sans' is, well, godlike, it often changes the power balance in the 'High School DxD' world. Another theme could be the clash of cultures, as 'sans' comes from a very different universe compared to the one in 'High School DxD'.
Yes, there are some. You can start by looking on fanfiction platforms like Archive of Our Own. There are often various takes on crossovers like this, but the quality can vary. Some might focus more on the action elements from 'High School DxD' while incorporating the unique characteristics of 'godlike sans'. It's really a matter of personal taste when it comes to finding one you'll like.
One interesting plot could be Godlike Sans using his unique abilities to help the characters in High School DxD in battles. For example, his teleportation skills might give them an edge in combat against powerful foes.
Frisk would be a likely candidate. Since Frisk is the main character in Undertale and has a very adaptable personality. They could approach Underfell Sans with an open mind and try to understand him.
Well, Ben could use his alien forms to help out the characters in High School DxD in battles. For example, if there's a fight against a powerful devil, Ben could transform into Four Arms and use his super strength. The characters in DxD would be amazed by his abilities.
The Power Rangers, being used to a more action - oriented and team - based dynamic, would likely bring their sense of discipline and cooperation to the interactions. They might be initially confused by the more chaotic and hormonal nature of the High School DxD characters. The High School DxD characters, on the other hand, would be intrigued by the Rangers' powers and technology. Issei, for example, might be eager to learn about the Rangers' combat skills and see if he could incorporate them into his own fighting style.