Adventure is another typical theme. They could go on adventures together, either in the Other World or on Earth. These adventures can range from fighting new villains to exploring uncharted territories. This theme allows for a lot of action and excitement in the fanfictions.
One could expect an exciting adventure. Maybe it'll involve Goku's power being used in a unique way to protect the timeline that Supreme Kai of Time oversees. It could also show a different side of their relationship, perhaps a friendship that develops as they face challenges together.
In the Dragon Ball universe, there are many strange and wonderful things. King Kai might have access to some rare or magical items. He could use one of these items to help Goku's tail grow back. For example, there could be a special fruit on his planet that has regenerative properties. When Goku consumes it or King Kai uses it in some other way, it triggers the growth of the tail.
Another storyline could involve Supreme Kai of Time getting into trouble in a different timeline and Goku having to rescue her. Along the way, they discover new forms of power and new allies.
Well, 'ke kai o kahiki great big story' is rather mysterious. Maybe it's a story passed down within a certain community. 'Ke kai o kahiki' might refer to a body of water or a place related to Kahiki. The 'great big story' part makes it seem like it could be a grand narrative, perhaps about the history, legends, or the people associated with this 'ke kai o kahiki'. But again, without further information, it's just speculation.
There's a fanfiction where Goku accidentally ends up in West Kai's realm in a rather comical way. This sets off a series of events that lead to them getting closer. It's filled with action and light - hearted moments, showing Goku's naivete and West Kai's patience.
It could also be a symbol of a new power - up. In the Dragon Ball series, new physical changes often lead to increased power. So, getting his tail back might mean that Goku is about to reach a new level of strength. Maybe he'll be able to transform into a new form that is related to his Saiyan heritage and the presence of the tail. This could give him an edge in future battles against stronger opponents.
I don't know who Ken is specifically. The story he is telling could be about his personal experiences, like a trip he took, or it could be a fictional story he made up, perhaps a fantasy adventure with magical creatures.
Xu Kai was the same person. Xu Kai was an actor and model from Mainland China. He was born in Guangdong and was born in Shen Zhen. He officially debuted as a model in 2013 and began to dabble in the entertainment industry in 2016. Xu Kai had performed well in the TV series Chaoge, ostentatious, Yanxi Strategy, and won the audience's love. He had also worked with actors such as Bai Lu and Tian Xiwei on many TV series. In addition, Xu Kai also partnered with Zhao Lusi in the new drama,"Midnight Return," which aroused the expectations of the audience. Regarding Xu Kai's relationship, there were reports that he had scandals with Jing Tian, Zhao Qing, and others, but the exact situation was unknown. All in all, Xu Kai was a young actor who received much attention. His acting skills and looks were recognized.
I'm not sure who Mr Ken specifically is in this story without more context. It could be a character created by an individual author, perhaps a local or personal story where Mr Ken is a neighbor, a friend or an acquaintance.