Age-wise:
When Pan first meets Goku after the wish, she doesn't recognize him and treats him like an ordinary small child. After she finds out that it's her grandpa, she starts being disrespectful towards him due to him being even smaller than her. The question is, why is Goku smaller than her if he got reverted to being a 12 year old, while Pan is only 10? Did Pan have any proper reason to insult him because of that, if Goku could counter by mentioning that he is still order than her, even after the wish? In one of the episodes, Pan mentions that he looks more like 3 or 4. Was Goku in-fact shrunken down to the size of a 3 year old and Pan's reasoning was legit all along?
Personality-wise:
In episode 1, before Pan realizes who the boy is, Goku cheers her up after her potential boyfriend leaves her. In a moment like this, girls need all the support they can get, which we could see by her look. If Master Roshi didn't point out their names, this conversation may have been a bit longer. Unfortunately instead of getting happier she got even more disappointed realizing that the boy who finally noticed her, was in fact her grandpa.

Later during their space adventures, she has spent more time with Goku (who was now close to her age) than any other boy, because they all left her due to her unusual strength. Pan was shouting at her kid grandpa many times because of his behaviour. But from what it seemed, deep inside she wished he wasn't her grandpa, because he was perfect for a tomboy like her - adventurous and carefree. I find it strange the writers went that route, but their relationship seemed more like little boy-little girl couple instead of grandpa-granddaughter. I believe that Pan wanted Goku to grow up to an adult as fast as possible so she could get rid of her "inner feelings". There are multiple reasons I've noticed for that:
Then, throughout GT we have more "hints" at how much fun Pan and Goku are having together and are so-alike
It appears that the writers for some reason were trying to make PanxKidGoku a thing. If some people ship Pan and Trunks then there should be nothing wrong with this pairing, considering there is more actual evidence from the anime. Sure, Goku might've been her grandpa, but after the wish he is a kid and acts like one. He didn't even mind being naked in front of Pan. So like I said, it is very possible that Pan might have had feelings for Kid Goku as well, and wished that the only boy she spent so much time with, wouldn't be her grandpa.
What are your opinions regarding their relationship?
















