On the positive side, the power he absorbs might help him save the world more effectively. He could be able to defeat stronger enemies and protect his loved ones better. However, he would also have to learn to control this power, which could be a long and difficult process. If he fails to do so, he might accidentally cause harm to those around him.
Well, one possible consequence could be that Percy gains an immense amount of power. Kronos was a very powerful Titan, so Percy might become nearly invincible. He could also face some internal struggles as Kronos' essence might try to influence his mind and actions.
Well, it could mean a huge power boost for Percy. Hyperion is a powerful Titan, so Percy might gain abilities like enhanced strength, maybe some new control over light or the sun. It could also change his status among the demigods, making him even more of a force to be reckoned with.
He might face internal struggles. Since it's the power of his enemies, it could have a corrupting influence. He has to constantly fight against the darker aspects of that power, like the urge to use it for revenge or in a more aggressive and unethical way.
One consequence could be new powers. If he absorbs the DNA of a powerful ninja, he might gain their unique abilities. For example, if it's from a ninja with ice - based powers, Naruto could potentially start to use ice - based jutsu. Another consequence could be changes in his appearance. The absorbed DNA might have physical traits that start to show up on Naruto, like different eye color or hair texture.
There could be physical changes too. Naruto might have a new form that combines his own features with Momoshiki's. His body could become more resilient, like Momoshiki's, and he might have a different chakra signature. This new form could attract the attention of other villains in the Naruto universe, either out of fear or the desire to steal his power. Moreover, his relationships with other characters like Sasuke could be affected, as they have to adapt to this new Naruto who has absorbed Momoshiki.
He could gain new and powerful abilities. For instance, if he absorbs a Sharingan - like bloodline, he might gain enhanced vision and the ability to copy jutsus more effectively. But there could also be negative consequences. His body might reject the new bloodline at first, causing him pain and internal conflict.
In fanfiction, when Naruto absorbs animals, it might lead to a change in his personality. If he absorbs a predator like a wolf, he could become more aggressive or assertive. On the physical side, his body might adapt to the absorbed animals' traits, which could cause some difficulties in his normal ninja activities at first. Socially, some people in the Naruto world might see him as a freak or a powerful new threat, depending on their views.
One consequence could be a change in his personality. If he absorbs the souls of evil - natured people, there might be a dark influence on him. For example, he could become more aggressive or cynical.
One consequence could be that the fanfiction community might feel less connected to the character. If Percy doesn't seem to interact with or acknowledge the fan - created stories, fans might feel like their creativity isn't being recognized. For example, they might be less motivated to write more stories about him.
For the demigods, things could change a lot too. Percy is a champion of the demigods, and his victory over Zeus might mean better treatment for demigods. They could be more respected and have more rights in the world of gods and mortals. However, it could also make them targets of those who are against Percy's actions.