Since I haven't read it, I can't say for sure. But based on the title, the main characters are likely to be the 'oroka na tenshi' (the naive angel) and the 'akuma' (the devil).
I'm sorry, I haven't read this light novel specifically. But generally, from the title, it might be about an 'oroka na tenshi' (a naive or simple - minded angel) that has some sort of interaction with an 'akuma' (devil) and they 'odoru' (dance). It could be a story full of supernatural elements, with a plot centered around the relationship between these two opposing beings, perhaps exploring themes like good vs. evil, redemption, or the blurring of moral boundaries.
Based on the title, it could be a story that revolves around the interaction between a powerful and perhaps menacing figure like the Maou and an ordinary person. Maybe there are comical elements as the two very different characters from different worlds collide. It could also explore themes of power, friendship, or the ordinary person's journey in a world influenced by the Maou.
Another theme might be self - discovery. The characters, especially the ones from different backgrounds like the maou and the commoner, might be on a journey to discover who they really are in this new or different world setting. This could involve exploring their powers, their place in society, and their relationships with others. In a more detailed way, as the story progresses, they may face challenges that force them to reevaluate themselves and their beliefs. For instance, the maou may have certain expectations of how things should be, but through interactions with the commoner, those ideas could be challenged and changed. Also, the commoner might find new strengths or abilities within themselves that they never knew existed, which is a common aspect of self - discovery in many light novels.
The unique character dynamics. Dendy is smart and tech - savvy, while Ko Lemon has her own charm. Their relationship with OK KO can create complex and interesting scenarios in fanfic.
One common theme could be friendship. Given the relationship between the characters in the show, fanfictions might explore different aspects of their friendship, like how they support each other in tough situations.
To develop Ok Ko, put him in moral dilemmas. Should he save the day at the cost of breaking a rule? This would show different aspects of his character. For Enid, you can develop her by having her interact with characters she doesn't usually get along with. This could lead to her learning to be more patient or understanding. Ko can be developed by giving him a personal goal outside of just helping Ok Ko. Maybe he wants to be recognized for his own skills in the plaza, which could lead to some interesting character development as he tries to balance his own desires with his loyalty to his friends.
A plot could revolve around a competition in the plaza. Ok Ko, Enid, and Ko all enter. Enid might initially be seen as the underdog, but with the help of Ok Ko and some unexpected skills of Ko, they end up doing really well. It could also be a story where they discover a new power or ability within the plaza that only the three of them can unlock together through their combined skills and friendship.
The fanfic might focus on the unique dynamics between Tokaku and Haru. For example, it could show how their personalities, one being more reserved perhaps (Tokaku) and the other more open (Haru), complement each other. It may also explore their shared experiences and how those shape their relationship within the story.
I'm not sure where to specifically find 'ok ko dendy x ko lemon fanfic'. You could try searching on some fanfic platforms like Archive of Our Own or FanFiction.net.