In Chainsaw Man fanfiction, the relationship between Denji and Makima can be quite complex. Makima often has an air of mystery and power around her. Denji, on the other hand, is initially drawn to her in a somewhat naive way. Fanfic authors might explore how Denji's growth as a character is influenced by his interactions with Makima. For example, he could start to question her motives as he becomes more aware of the world around him.
One common theme is the exploration of their relationship. Since they have different personalities, fanfics often focus on how they get along or clash. Another theme is growth. Denji and Asa both have room to grow as characters, and fanfics might show how they help each other in that process. For example, Denji might teach Asa to be more carefree in some fanfics, while Asa could teach Denji about being more self - aware.
One common theme is the exploration of power imbalance. Makima has significant power, and Denji is a bit of an underdog. Fanfics often play with this dynamic, showing how Denji might try to gain more power to be on an equal footing with Makima. Another theme is the blurring of loyalty and love. Denji's loyalty to Makima can be misconstrued as love, or vice versa, and fanfic authors like to dig into this ambiguity.