If Raditz survived in fanfiction, he would likely have a complex relationship with Goku. He might start to see the value in Goku's way of life. Goku could try to reform him, and Raditz could slowly become a more positive force in the Dragon Ball Z universe.
A good Raditz story should focus on his Saiyan heritage. For example, showing how his Saiyan instincts play out in different situations, like when he's facing a tough enemy or making a decision about whether to show mercy or not.
If Raditz turned good, it might have led to more complex character dynamics and interesting plot developments. He could have learned from his mistakes and become a valuable ally.
Raditz could be redeemed by sacrificing himself for the greater good. For example, if there was a powerful enemy threatening the Earth and he steps in to take a fatal blow meant for someone else, like Gohan or Goku.
Family ties are a key element. Since they are brothers, fanfictions often explore their complex relationship, like how they deal with their Saiyan nature versus the influence of Earth. For example, in some, Goku tries to make Raditz understand the importance of protecting the planet.
It's possible that Raditz tells a story about his journey to Earth. He could start from when he first set off from his home planet, what he encountered during the long travel in space, and how he finally located Earth. He might also include his initial impressions of Earth, like the strange environment, the different power levels of the beings here compared to what he was used to on his home planet.
One common theme is redemption. Since Raditz is initially a villain in the Dragon Ball series, many fanfictions focus on how a female character can bring about his redemption. For example, through her kindness and understanding.
The 'breakthrough the limit Raditz fanfic' might be significant as it allows fans to delve deeper into Raditz's capabilities. Raditz is often seen as a relatively one - dimensional character in the original work. In a fanfic like this, he can break through his limits. This could mean surpassing his previous power limits, which might lead to different interactions with other characters. For instance, if he becomes stronger, his relationships with his Saiyan brethren or the Z - Fighters could change drastically. It also provides an opportunity for the author to explore themes like self - improvement and redemption through Raditz's journey of breaking limits.