Kim Pine herself is often very well - written. Writers can really explore her complex personality, her love for music, and her sometimes prickly relationship with Scott.
A possible storyline is that Kim Pine discovers a hidden talent of Scott Pilgrim that no one else knew about, like he can paint amazing murals. This could lead to them collaborating on an art project in the neighborhood. Well, in some fanfictions, there could also be a storyline where they go on a road trip together. Along the way, they meet all kinds of strange characters and have to overcome various obstacles, which in turn strengthens their friendship or even leads to something more.
Scott Pilgrim was indeed a comic first. It had a dedicated fan base from the comic world before branching out into other entertainment areas. The comic's success paved the way for its expansion into various mediums.