It's not a true story. 'Jakob the Liar' is the product of the author's imagination, designed to engage and captivate the audience through fictional elements and plotlines.
Riddick didn't start as a comic book. It might have been inspired by various sources, but not from comics initially. Maybe it came from a movie concept or a novel idea.
The Chronicles of Riddick is not a comic book. It's more recognized for its cinematic adventures rather than having a comic book counterpart. Although sometimes properties expand into different mediums, in this case, the main focus has been on the films.
The story behind Riddick involves his struggle for survival and his unique skills that help him overcome numerous obstacles. He has a history of being on the run and getting into intense conflicts.
For a Corrin x Jakob fanfiction to be worthy, it should also stay true to the source material to some extent. This doesn't mean it can't be creative, but it should respect the basic characteristics of the characters. For instance, Jakob's loyalty and Corrin's kind - hearted nature should be reflected in the story. Additionally, a fanfiction that can make the readers feel emotions, whether it's excitement, sadness or joy, is more likely to be considered worthy.
Friendship is a common theme. Since Cow Chop is a group, fanfics often show Jakob's relationships with the other members, highlighting the bond they share.