Adrien might find himself being influenced by the power of the brooch in unexpected ways. The brooch has a connection to the akumas and their creation, so it could potentially corrupt him or make him act out of character. He might also be ostracized by his friends if they discover he has the brooch, as they might not understand his motives.
Well, in fanfictions, the butterfly brooch when used by Adrien could have multiple interpretations. It could be a means of him expressing his individuality in a world that often tries to confine him. It might also be used as a form of communication, like a secret signal to someone he trusts. Additionally, it could be a tool for him to gain access to a certain group or place. The brooch could be the centerpiece of a sub - plot where Adrien has to protect it from those who would misuse its power, or it could be the key to unlocking a long - forgotten secret in the fanfiction's universe.
The 'Adrien takes the butterfly brooch' fanfiction could go in many directions. Adrien might take the brooch out of curiosity. He's always been in the middle of the akuma battles, and having the brooch could give him a new perspective. He could try to communicate with the butterflies, or he could end up in a situation where he has to hide the brooch from his friends and family, fearing that they might misunderstand his intentions.
Well, perhaps Adrien steals the butterfly brooch because he suspects it has some dark power and he wants to keep it from being misused. He might see Hawkmoth using it in a way that endangers Paris and decides to take matters into his own hands.
Maybe Adrien steals the butterfly brooch because he suspects it has some connection to Hawkmoth. He might think that by taking it, he can prevent Hawkmoth from using it for evil purposes.
Hawkmoth would surely be affected. Since the butterfly brooch is likely an important part of his power or plan, losing it to Adrien would disrupt his operations.
Since I don't know the specific fanfiction, I can only speculate. It might be a grand scene where Adrien is in a dimly lit room, the butterfly brooch glinting in the faint light. He approaches a mirror, holds the brooch up to his chest, and as he attaches it, there could be a sudden gust of wind or a strange glow that surrounds him, signifying that something extraordinary is about to happen.
Hawkmoth would most likely be the main antagonist. Since Adrien steals the butterfly brooch from him, Hawkmoth would be furious and would do everything in his power to get it back. He might send out more powerful akumas to force Adrien to return the brooch.
One possible consequence is that Naruto's body might not be able to handle Kurama's full power all at once. It could lead to physical harm or even death if not managed properly. Also, his relationships with Sakura, Sasuke and others would be in jeopardy as they might not recognize the Naruto under Kurama's control.
One possible consequence is that the demigod world would be thrown into disarray. Percy has been a key figure in maintaining some sort of order, and with Kronos in control, that order would be shattered. Another consequence could be that the Gods would be in a real bind. They already had trouble with Kronos before, and now with him in Percy's body, it would be much harder to fight him.
Well, the plot could involve Adrien initially being confused by the power of the Butterfly Miraculous. Maybe he accidentally activates it and starts sending out akumas without really understanding what he's doing. Then, he has to figure out how to reverse the chaos he's caused while also hiding his new - found power from his friends and family.