I think their interaction would start with a lot of confusion. Goku has no concept of magic in his world, and Harry would be equally baffled by Goku's ki energy. However, they both have a strong sense of justice. So, once they got over the initial shock, they would probably find common ground in protecting the innocent. Harry could use his invisibility cloak to sneak up on enemies, and Goku could provide the brute force in battles. Their combined skills could be a formidable force against any foe.
Well, Harry Potter is from a world of magic, wizards, and Hogwarts, while Goku is a Saiyan from the Dragon Ball universe with superhuman strength and the ability to fly. If they were to interact, it would be quite a sight. Harry could use his magic spells, like Expelliarmus to disarm Goku, but Goku's speed and power might make it hard for Harry to land a hit. Goku, on the other hand, might be intrigued by Harry's magic. He'd probably want to learn about it or test his strength against it. Maybe they could team up to fight a common enemy, with Goku using his physical power and Harry using his strategic spells.
In a fanfiction scenario, Harry Potter and Goku's meeting could be epic. Goku's carefree and adventurous nature might contrast with Harry's more serious and burdened personality. But they could learn from each other. Goku could teach Harry about the importance of physical training and pushing one's limits. Harry could introduce Goku to the wonders of magic, like the Room of Requirement where one can get whatever they need. They might also have some friendly competitions, like a race where Goku uses his flight and Harry uses his broomstick, or a duel where Goku tries to dodge Harry's spells with his speed.
The best chapter pointer here is Chapter 86, "If you don't welcome me, why should I stay?". It opens with After over an hour of fuss, it was finally time to eat. and closes on But then her expression became resolute and arrogant..
A practical answer is Chapter 78, because it turns the idea into a concrete scene. The chapter opens with He Yun, too, tidied up and walked over to rest in the shade of a tree., adds pressure through That weed whacker is obviously mine!, and ends on [HAHAHA, is it just me or does Movie Emperor He.
Look to Chapter 117 for the clearest answer. It begins with Fragrant and cloyingly sweet potatoes and corn were out of the pot, and Qi..., keeps building through The searing heat made him grimace in pain, but he didn't let go, and he..., and lands on Since entering puberty, his mother had exerted.
Look to Chapter 94 for the clearest answer. It begins with Jiang Li really has some skills, being able to figure that out." "Can the..., keeps building through I always feel my boyfriend is cheating on me., and lands on Brother is going to dress you up; look how pretty this outfit is."....
A practical answer is Chapter 134, because it turns the idea into a concrete scene. The chapter opens with After a brief noon rest, the production team was up to their antics again., adds pressure through Thus, Jiang Li's live stream was once again flooded with netizens coming..., and ends on [Are.
The best chapter pointer here is Chapter 81, ""Chicken Fleeing and Crabs Escaping" cp". It opens with Qi Tianyu, who chose curry beef rice, received a piece of curry and a... and closes on The summer on the Southwest Plateau is no joke; the sun at three o'clock....
Chapter 106 is the strongest chapter-level answer because it starts from Thinking of this, He Yun nodded with a hint of anticipation. and follows through on Jiang Li's fingers lingered over the three copper coins, her clear voice....
Chapter 73 is the strongest chapter-level answer because it starts from Director Sun, tongue-tied, finally managed to squeeze out a sentence,... and follows through on Despite Wen Jiaojiao's fiery temper, there were still many who were drawn....
The best chapter pointer here is Chapter 54, "Acting Righteously Hits the Trending List Again!". It opens with Five minutes later, the people of Chixia Village, who had received the... and closes on She was also polite and friendly, and to top it off, she was good-looking,....
If you want the clearest chapter reference, go to Chapter 51. Early on, Oh, okay." After uttering two syllables indifferently, Jiang Li bent down...; later, the chapter leans on By the time she reacted, Jiang Li had already disappeared at the end of....