The reaction of the Dragon Ball characters to Thanatos' invasion would be complex. Goku, as always, would approach it with a sense of adventure and the desire to test his limits. He would be the first to reach out to Thanatos in combat. Vegeta would be seething with anger at the thought of someone invading their territory. He would fight with all his might, using his Galick Gun and other powerful attacks. For the younger characters like Trunks and Goten, they would be inspired by the older fighters. They would follow their lead and contribute in their own ways. The non - Saiyan characters like Krillin and Tien would use their unique fighting styles and skills. The Dragon Ball universe has a long history of coming together against threats, and this would be no different.
The Z - fighters like Krillin and Yamcha would be curious about Naruto. Krillin might try to befriend him quickly, while Yamcha might be a bit jealous if Naruto starts getting a lot of attention. In the Naruto world, characters like Sakura and Sasuke might not even notice Naruto's disappearance at first if he has been neglected. But later, they might realize the importance of Naruto when things start to go wrong in their world without him. And in the Dragon Ball universe, Piccolo would be very watchful of Naruto, trying to figure out his motives and if he poses any threat to the safety of the planet.
At first, Naruto would likely be very curious. He'd be eager to learn about this new world of Dragon Ball Z through the fanfiction. As he delved deeper, he'd start to form his own opinions about the characters. He might admire Goku's pure heart and his never - ending quest for self - improvement, and perhaps think about how he can apply some of those qualities to his own life as a ninja.
Vegeta would probably be both jealous and intrigued. Jealous because Goku has achieved a new level of power through this fusion, and intrigued because he wants to see how this new being fares against enemies. He might also be secretly glad that Frieza, his long - time enemy, is now in a form that he can tolerate (barely).
Gohan would likely be extremely shocked and angry. He is Pan's father and would have a hard time accepting this situation. Vegeta might be disappointed in Trunks, as it goes against Saiyan propriety. Bulma would probably be worried about the implications for the family and how to handle the situation. Goten might be confused and not know how to react, as it involves his nephew and niece in a very unexpected way.
Some animals would hide. Mice would scurry into their holes and stay there until they think it's safe.
Well, if Thanatos invades the Dragon Ball universe, it could be a total chaos. The Dragon Ball characters are extremely powerful with their ki blasts and transformations. But Thanatos has his own set of abilities too. Maybe he would target the Dragon Balls themselves to gain ultimate power. The Z - fighters would surely put up a great fight though. They wouldn't just let an outsider take over their universe without a tough battle.
Rarity would be more interested in how the power levels are presented visually. If there are any shiny or impressive displays of power, she would be all about it. Pinkie Pie would just turn it into a game, making up her own power levels for the Mane 6 and seeing how they stack up against the Dragon Ball characters. Applejack would think the power levels are a bit over - the - top but would respect the fact that it's part of the Dragon Ball world.
The other characters' reactions would be complex. Hawkeye was a beloved member of the team. His death during a Kree invasion would send shockwaves. Characters like Wanda Maximoff, who might have had a close bond with Clint, could be emotionally shattered. She might use her powers in an erratic way, either out of grief or a desire for revenge. Vision, on the other hand, might try to use his logical approach to analyze how this happened and how to prevent further losses. The team's dynamic would be severely disrupted. Some might become more withdrawn, while others would try to fill the void left by Clint, but it would be a difficult and emotional process for all of them.
Some characters may laugh out loud. The abridged fanfiction often has comical elements that could make the characters find it really funny.
They'd be shocked. Goku is a legend in the Dragon Ball world, so they'd be super excited and probably a bit scared too.