The Writing Writer is the creator of the Fiction and 'God' of Heaven's Fence. He remains in the background for the majority of the story, only intervening directly in the events of the story in Good Apollo, I'm Burning Star IV, Vol. 1, where he enters through the The Willing Well to kill Ambellina to ease his suffering in the real world.
His avatar in the story is the Character AKA Claudio Kilgannon, who is largely based upon himself. However this does not mean Claudio sees eye-to-eye with the Writer.
Prior to From Fear Through the Eyes of Madness, the Writer was in a relationship with Erica Court, a young woman who he loved dearly. However, he soon discovered she was being unfaithful, and their relationship went from loving to hostile. The Writer was soon plagued by nightmares and driven to the edge of sanity.
Good Apollo, I'm Burning Star IV, Vol. 1 - From Fear through the Eyes of Madness Edit
At the start of Good Apollo, the Writer is still facing the consequences of Erica's betrayal. He is slowly losing his grip on sanity and is unable to cope with the loss of his one-time lover. During one of his many delusions throughout the story, he finds himself dwelling in the house of Newo Ikkin, who represents Erica as he sees her now. When he returns, he is confronted by Ten Speed of God's Blood and Burial, who declares that Erica's betrayal was not his fault and he shouldn't mope around, but instead make her suffer. While the Writer ignores him at first, he eventually becomes desperate.
However, he misinterprets Ten Speed's words. He does not want him to kill Erica, but Ambellina. Being his ideal version of Erica Court as she once was, ending her might end his suffering in the real world. The Writer is unwilling to surrender his favorite character to end his own pain. This changes as his madness gets worse and worse, culminating in his discovery of the Willing Well and his intervention into the Willing Well. He meets Claudio Kilgannon, his avatar in the Fiction, who is in the process of brutally destroying an Onstantine Priest. Claudio faces him and the Writer declares that he is fiction, the manifestation of himself on Heaven's Fence. He explains why he must kill Ambellina to end his suffering, and Claudio denies him shouting "My God is a Coward!". He tries to stop him from killing Ambellina, but even his new godly powers are useless against the real. Ambellina dies and Claudio is left heartbroken. The Writer's final words to his creation are simple.
"Your time has come Crowing... You're Burning Star IV. All worlds from here must burn."
- The Writer can obviously be compared to Claudio Sanchez, the real life writer of the story.