In this fanfiction, Gabriel could be an original character created by the author. He might be a powerful wizard with a mysterious past. Maybe he was once a great hero or a feared dark wizard, and his connection to Harry is what makes the story so interesting.
One possible plot could be Harry growing up in a world filled with magic and mystery, given Gabriel's likely otherworldly nature. He might discover his powers gradually and struggle with the expectations that come with being Gabriel's son. Maybe he has to face off against dark forces that threaten his family and the world he knows.
I'm not sure who the author of this particular fanfiction is. There are so many fanfiction writers out there, and it can be hard to track down the originator of a specific one like this.
Well, without reading it specifically, it could be about a very unique alternate universe where Harry Potter is the son of Gabriel in the DxD (High School DxD) universe. Maybe it combines the magic from the Harry Potter world with the supernatural elements of DxD, like devils, angels and fallen angels.
He would likely be more otherworldly. Since Gabriel is often associated with the divine or supernatural, Harry might have an air of mystery about him. His powers could be on a different level compared to the regular Harry Potter character, perhaps more angelic in nature.
One interesting plotline could be Harry's discovery of his true parentage as the son of Gabriel. It might lead to a whole new set of magical abilities and a different relationship with the wizarding world. For example, he could have a unique connection to certain spells or magical creatures that are related to Gabriel's heritage.
Gabriel could be an original character created by the fanfiction writer. Maybe he's a powerful and reclusive wizard who lives on the outskirts of the wizarding world.
Well, in a 'harry is gabriel's mate fanfiction', perhaps it's about how they met. Maybe it was in a magical or unexpected place. Then it could explore how they discover their unique bond as mates. They might have to deal with characters who oppose their relationship or situations that force them to rely on each other more and more as they grow closer.
Obviously Naruto as the main character. Gabriel would be a key figure, perhaps appearing in flashbacks or even in a more present form to guide Naruto. There could also be other Naruto characters like Kakashi, who might be intrigued by Naruto's new heritage and try to help him understand and control it.
Well, it could be about Naruto having some sort of divine powers inherited from Gabriel. Maybe he has to use these newfound powers to face tougher enemies in the Naruto world. He might also struggle with his identity as both a ninja and the son of a divine being.