Aside from the Z - fighters, there could be new characters introduced in this fanfiction. For example, an ancient being who has knowledge about the 'heir of destruction' power could be a main character. This being could either help or hinder Gohan on his journey. Also, some of Gohan's friends from school or other parts of his life might also be involved, showing how his new power affects his normal life as well as his role as a protector of the Earth.
Obviously, Gohan would be the main character as the title implies. But there could also be other characters like Piccolo. Piccolo has always been an important figure in Gohan's life, training him and guiding him. He might play a crucial role in helping Gohan understand and control his new 'heir of destruction' power.
The fanfiction could potentially show Gohan's journey in a darker tone. Heir of destruction might imply a more menacing or uncontrollable power within him. It could be that he is shunned by some of his friends and family at first because they fear this new power. However, as the story progresses, he proves that he can use it for good, perhaps by protecting the Earth from a new and powerful threat that only his unique power can defeat.
Often, his friends at high school can be important characters too. They might be normal humans who are curious about Gohan's sometimes strange behavior. And of course, his family members like Chi - Chi could make appearances, maybe giving Gohan advice on how to balance school and home life.
Maybe a powerful demon who has the ability to possess animals. He uses this power to send hordes of possessed animals against Gohan. His goal is to drain Gohan's energy and use it to break free from a magical seal that has been confining him for centuries. He sees Gohan as a threat to his plan because of Gohan's strength and connection to the Dragon Balls.
In fanfiction, Gohan could have an encounter with a wolf in many ways. Maybe the wolf is a magical or mutated creature in a story where Gohan has to protect the forest it lives in from some greater evil. The wolf could also be a spirit guide of sorts, leading Gohan to a new power or a hidden place full of secrets.
Maybe an evil scientist who has created a new form of bio - weaponry. He targets Gohan and Lime because they pose a threat to his plans of world domination. His creations could have abilities that are a challenge for Gohan and Lime to counter.
In a crossover with the Avengers, Iron Man could be an ally. His high - tech gadgets combined with Gohan's power would be a great team. Also in the Pokémon world, Ash could be an ally. Ash's knowledge of Pokémon and Gohan's combat skills could be useful. In the Bleach universe, Ichigo could be a strong ally for Gohan, with their combined sword - fighting and energy - blasting abilities.
Obviously, Gohan would be the main character. Videl could also be in it as a classmate or a potential love interest. Piccolo might keep an eye on Gohan from afar to make sure he doesn't get into too much trouble. And of course, Gohan's friends from previous adventures could make cameo appearances, like Krillin dropping by the school sometimes.
In Dragon Ball, Videl is a martial artist. She meets Gohan and they have a relationship. Gohan, being half - Saiyan, has unique abilities like the ability to transform into a Super Saiyan. Videl is a human but she is very skilled in combat. She is also a student at the Orange Star High School.
It could be a new Saiyan from another part of the universe who is jealous of the power the family holds. He might come to Earth to challenge the son and prove his own superiority.
It could be a Saiyan. Since Saiyans are known for their strength and love for battle. A Saiyan could be chosen to become the new God of Destruction, like Goku or Vegeta's descendant who has a unique power that makes them suitable for the role.