First, know the Good Omens universe well. Read the book and watch the show. Then, think about your OC's personality, backstory, and how they fit into the existing world. Create a unique character arc for them. Start writing simple scenes to introduce your OC and gradually build the story around them.
Yes, it was a successful novel. The characters in 'Good Omens' are well - developed and memorable. The story's ability to balance the serious topic of the end of the world with comical situations and witty dialogue made it a hit. Moreover, its popularity led to adaptations in other media, which is a clear sign of its success as a novel.
Sure, there is a Good Omens graphic novel. It brings the story to life in a visually appealing way. The illustrations enhance the experience of the narrative.
Good Omens is primarily a traditional novel. However, there might be some related adaptations or spin-offs in other forms, but the original work is not a graphic novel. It's known for its rich and imaginative storytelling in prose.
Well, for Good Omens OC fanfiction, try checking out some dedicated Good Omens fan communities on Reddit. There are subreddits where fans share their works and recommend others. Also, if you follow some Good Omens fan accounts on Twitter, they might retweet or mention some great OC fanfics. Some Discord servers related to Good Omens might also have channels dedicated to fanfiction sharing.