One key moment was when Krillin showed kindness to 18 when others were treating her as just an android enemy. Another moment was when 18 started to trust Krillin and let down her guard around him. And of course, their decision to get married was a major key moment in their love story.
Their relationship could grow deeper as they face the challenges of pregnancy together. Krillin might become more in tune with 18's needs, and 18 could see a new side of Krillin's caring nature.
Bulma could also be a common character paired with Krillin. Bulma is very intelligent and could potentially help Krillin figure out how to time travel better or she might be the one who creates the time - travel device in the first place. And she could use her resources to help Krillin in his time - traveling adventures.
In the manga, Krillin doesn't stop training. His sense of duty and the need to protect his comrades push him to keep improving his skills and strength.
One common theme is self - improvement. Krillin is often depicted as constantly striving to get stronger, whether it's through new training methods or unlocking hidden powers.
Love and affection could be a major theme. The 18 kisses are a clear sign of that. Another theme might be acceptance, as Krillin accepts 18 for who she is, an android, and she accepts him with all his flaws.
Maybe a story where 18 and Krillin decide to open a martial arts school. They have to deal with different types of students, and it shows their relationship growing as they work towards a common goal. It can include how Krillin uses his knowledge and 18 her strength to train the students.
It could be that new and upcoming authors are also creating amazing Super Krillin fan fiction. They might bring fresh perspectives to the character, not being too influenced by the traditional ways of writing about Krillin. They could introduce new storylines, new character traits, or new relationships for Krillin that make their fan fictions stand out.
One great Krillin fanfiction is 'Krillin's Ascent'. It focuses on Krillin's journey to become stronger, training in new and unexpected ways. He overcomes his self - doubts and insecurities as he rises in power, which is really inspiring.