One interesting story could be about Goku arriving at the High School DxD world and accidentally getting involved in a Rating Game. His super strength and unique abilities would completely change the dynamics of the game. Another could be where he befriends Issei and teaches him some of his martial arts moves, enhancing Issei's combat skills in a new way.
Goku's powers in a High School DxD fanfiction would be a game - changer. His ki attacks could be on a level that could potentially destroy entire areas in the DxD universe. His martial arts skills are also top - notch. In a fight, he would use his speed and agility to dodge attacks and then counter with his powerful punches and kicks. His transformation abilities, like Super Saiyan, would be a shock to the characters in DxD. They might not have any means to counter such a huge boost in power.
Well, he could be a powerful antagonist. His skills and power from the Dragon Ball universe would make him a formidable foe in the High School DxD world. He might be interested in the power of the devils and angels there and try to take it for himself.
Goku Black could potentially enter the High School DxD world through a dimensional rift or some sort of magical accident. Once there, his Saiyan pride and his dark motives (from his own story) could lead to him either trying to take over the various factions in the DxD world or simply looking for a worthy opponent. He might interact with the main characters like Issei, perhaps seeing him as a target to prove his superiority or a potential ally in his own schemes.
Goku Black might become a sort of anti - hero. He has his own sense of justice (albeit a twisted one in his original story). In the High School DxD world, he could oppose some of the more corrupt elements of the different factions while also causing trouble for the main characters as they try to figure out his motives. For instance, he could see the way some devils treat humans in the DxD world and decide to take matters into his own hands, but not in a way that the main characters would necessarily approve of at first.
His Saiyan transformation abilities would be a game - changer. For example, when he transforms into a Super Saiyan, his power level would skyrocket. In the High School DxD world, this could make him seem like an unstoppable force. His speed would also increase exponentially, allowing him to dodge attacks from the fastest characters in the DxD universe with ease. His powers are based on physical and energy training, which is different from the more innate powers of the DxD characters, so it would create an interesting contrast.
His ki - based attacks would be a new and powerful addition. In High School DxD, most of the powers are related to magic, sacred gears, and demonic or angelic powers. Goku Black's ki blasts would be a completely different form of energy that could catch everyone off - guard.
El Paso High School has a rich story. It's likely filled with tales of students' growth, academic achievements, and school traditions. Maybe there are stories about great teachers who inspired generations of students there.
Goku could have some interesting interactions. He might befriend Issei for his determination. Goku, being a pure - hearted fighter, would probably respect Issei's will to get stronger. He could also have friendly rivalries with some of the stronger devils or angels, challenging them to friendly spars to test their strength.
Since I don't know the exact story, it could potentially be about a figure who met a watery end and was considered beautiful in a way that defies normal expectations. It could be a story about love and loss, where the person who drowned was remembered in a special way that made them seem the most beautiful. It might also be a story with a moral or lesson, perhaps about the transience of life and the power of memory.