Perhaps Gohan's own overconfidence could lead to his death. He might underestimate an enemy's power or a dangerous situation and make a wrong move that results in his end. For example, he could rush into a fight without proper preparation thinking he can handle it easily.
Gohan's power of transformation could be affected. Instead of turning Super Saiyan in the normal way, it could be related to the haki system in One Piece. Maybe his Super Saiyan form gives him a special type of haki that is unique and extremely powerful.
Gohan may become more confident in relationships. In a harem situation, he has to deal with multiple people interested in him, which could boost his self - assurance.
Probably Natsu. They both have a strong sense of justice and are very powerful fighters. Natsu's fire - based attacks and Gohan's ki blasts could make for some amazing combined attacks in battle.
In some fanfictions, Gohan and Goku might have a series of conversations that open up new levels of understanding between them. Gohan could share his thoughts and feelings about his life and future, and Goku would listen and offer his own insights. This kind of communication can really strengthen their bond.
In non - lemon fanfiction, their relationship is often centered around family. Chichi is a caring mother and a supportive wife. She encourages Gohan in his studies and his Saiyan - related activities. Gohan, on the other hand, respects and loves his mother. He also values his family above all.
In such fanfictions, Goku might develop by becoming more of a mentor to Gohan. He could teach Gohan new fighting moves and also how to control his emotions better during battles.
It depends on the specific fanfic. There are a vast number of Dragon Ball fanfics out there, and while some may choose to have Android 17 be Gohan's teacher, others might not. Some fanfics focus more on the battle aspects, while others explore different character interactions. So, you really have to search through different fanfics to find ones where this is the case.
Captain America could be a great ally. His sense of justice and leadership would mesh well with Gohan's own values. They could both lead a team into battle and inspire others with their courage.
Gohan's character often develops by learning to control his Super Saiyan 3 power better. He might start out as a bit reckless with it and then grow more disciplined. For example, he could initially use it to show off but later realize the responsibility that comes with such great power.