One possible power is enhanced speed. Sparda is known for his agility in combat, and Naruto as his descendant in fanfiction could inherit this. He would be able to move so fast that his opponents could barely keep up. Another power could be the ability to manipulate demonic energy in a way similar to how he manipulates chakra. This could give him new jutsu - like abilities, for example, creating energy blasts with demonic properties. He might also inherit Sparda's resistance to certain types of attacks, like magic or dark energy attacks that are common in the Devil May Cry universe.
The fanfiction might explore the concept of a Naruto character being a descendant of Sparda in many ways. For instance, the character could have a special form or transformation similar to Dante's devil trigger in the Devil May Cry series (since Sparda is from that). This form could give them enhanced strength, speed, and abilities. They could also face challenges related to their dual heritage, like being shunned by some in the Naruto world who fear the unknown powers. And the story could revolve around how they overcome these prejudices and prove themselves as a valuable asset to their comrades and the entire ninja community.
In some fanfictions, the connection between Naruto and Sparda might be created through some convoluted plot devices. Maybe a powerful being in the Naruto universe has a link to Sparda's world, and through some magic or special bloodline manipulation, Naruto ends up being related to Sparda's bloodline. However, it's mostly a creative and often far - fetched idea in the realm of fanfiction.
It could be Naruto himself. Imagine if Naruto was secretly a descendant of Sparda. He would already have his own powerful chakra and then add the powers from Sparda's bloodline. It would make him an even more formidable force in the ninja world.
One possible power for Naruto as a descendant of a god in fanfiction is the ability to communicate with all living things. This would give him an edge in gathering information and in forming alliances. He could also have a special form of chakra that is far more potent than regular chakra, enabling him to perform jutsus that are otherwise impossible.
One possible power is the ability to use chakra. Since Naruto is known for his large chakra reserves, Blake could inherit a strong chakra pool. This would allow her to perform powerful jutsus, like maybe a modified version of the Shadow Clone Jutsu that suits her own combat style. Another power could be enhanced speed and strength, which Naruto also has, and Blake could use these in her battles more effectively.
Hermione could inherit Merlin's powerful transfiguration abilities. Given that Merlin was one of the most powerful wizards in history, his descendant Hermione might be able to perform extremely difficult transfiguration spells with ease. Like transfiguring large structures or multiple objects simultaneously, something that is usually very challenging for most wizards.
He could inherit time - related powers. Maybe the ability to slow down or speed up time, which would be a huge advantage in battles. He might also be able to see into the past or future, which could help him in making strategic decisions.
Since Yoruichi has strong spiritual energy in her world, Naruto might inherit some form of enhanced chakra that has spiritual aspects to it. This could give him new jutsu or abilities that are a blend of his original ninja skills and this new spiritual - chakra power. For example, he could use his new power to sense things in a different way, like Yoruichi can sense spiritual presences.
A plot might be that Naruto is born in the Naruto universe but has dreams and visions of Sparda. As he grows, he starts to show extraordinary powers that are not normal for a ninja. He then embarks on a journey to find out who Sparda is and discovers that he is his father. Along the way, he meets characters from the Devil May Cry universe who help him understand his powers. He has to fight against ninja clans who want to use his powers for their own gain and demons who want to corrupt him. He uses his Naruto - like tenacity and Sparda - inspired powers to overcome all these obstacles.
The baby could inherit Naruto's chakra reserves and his ability to use the Rasengan. Since Naruto has an enormous amount of chakra, it would make sense for the baby to also have a large chakra pool. The Rasengan is one of Naruto's signature moves, and it could be passed down genetically or through training that Naruto would give the baby as it grows up.