A Goku Reader Pan Fanfic usually centers around the relationship between Goku and Pan in a fictional scenario. It could be a romantic relationship, a mentorship kind of thing, or just a friendship. The 'reader' part might mean it's written in a way that makes the reader feel like they are part of the story, experiencing the events along with the characters.
Since 'lemon' usually refers to adult - themed content which is not appropriate to discuss in detail, we should focus on regular fanfiction characteristics. For pan and goku, it might involve exploring their relationship in different timelines, perhaps how Goku could mentor Pan in a more in - depth way in terms of fighting skills.
I'm not aware of any such fanfiction. The relationship between Grandpa Gohan and Son Goku in the original story is one of love and mentorship, so this kind of dark and negative portrayal in fanfiction is not common that I know of.
Goku and Grandpa Gohan's interaction could be full of wisdom - sharing. Grandpa Gohan was a wise man, and he would pass on more of his knowledge to Goku. Goku, in turn, would tell Grandpa Gohan about all the new friends he has made and the different planets he has visited. They might also spar a bit, just like in the old days, with Grandpa Gohan giving Goku some pointers.
One possible plot could be Goku reminiscing about his past with Grandpa Gohan. Maybe he visits the place where they used to train together. He could find an old relic or something that Grandpa Gohan left for him, which triggers a flood of memories and emotions. This would be a heartwarming story about their relationship.
The main characters are obviously Goku and Baby Pan. Goku, the powerful Saiyan, and Baby Pan, his daughter. Goku brings his strength and experience, while Baby Pan brings her youthful energy and potential.
One possible plot could be Goku taking Baby Pan on a training adventure. He could teach her new techniques and how to control her ki. They might encounter some minor villains along the way, and Goku would show Baby Pan how to handle the situation bravely.
Since lemon fanfictions involve inappropriate content, I can't recommend or promote their themes. But for regular Goku and Pan fanfictions, a common theme could be the passing of the torch. Goku, being a powerful Saiyan, imparts his knowledge and power to Pan, the next generation. It shows the growth and development of Pan as a fighter and a character.
Perhaps in the fanfiction, Goku accidentally ends up in a different part of Otherworld where he stumbles upon Grandpa Gohan. Grandpa Gohan could then take Goku on a tour of Otherworld, showing him all the different areas and the souls there. They might encounter some old enemies or friends who have passed away. And along the way, Goku and Grandpa Gohan could strengthen their bond and Goku could grow as a character from the experience.
The main characters are clearly Goku and Grandpa Gohan. Goku is the Saiyan hero who has had many adventures on Earth and beyond. Grandpa Gohan was the one who found and raised Goku when he was a baby. In this fanfiction, their meeting in Otherworld is the central focus.