Fitz has the rare ability to hear (but not see) ghosts. He's a smart, natural leader, calm and rational under pressure and able to weigh liabilities and to make and enforce decisions in the face of opposition.
Harry described Fitz as "youthfully scrawny, his skin bronze enough to look Native American, though his tangled red hair and pug nose argued otherwise. His eyes were an odd shade of brown, so light as to be nearly golden." He was just under six feet tall, taller than his companions. Fitz was about age seventeen but an experienced-aged much older look in his eyes. He had boxer-like scars around his left eye.
Fitz chose to join with Aristedes when numerous supernatural bad guys threatened anyone without protection. He witnessed Aristides kill one right in front of him and it melted. Aristedes uses and abuses him so badly that his chances of survival don't look very good.
Because of Fitz's ability to hear Ghosts, and Harry's natural concern for kids in trouble with no one to help them, Harry enlists his help in finding his murderer, and promises to help Fitz and his small gang to escape the tyrany of Aristides that he is caught up in.
In the seriesEdit
- Main article: Ghost Story
In Ghost Story, Harry Dresden's Ghost and Sir Stuart Winchester follow the gang of kids in their truck after they shot up Karrin Murphy's home. Stuart causes them to crash. With clear thinking, Fitz gathers all their weapons, unloads them and buries them under the snow. Harry follows them to their hide-out where he leans that they are all under the thumb of "Baldy" (Aristedes) who is furious and abusive to Fitz for ditching the guns. Harry talks Fitz, who can hear him, out of reacting to Aristedes in a way that would get him killed. Harry tells him to meet by the guns at eleven, he'll help him.
Later, after meeting by the guns, Harry's Ghost takes him to Nicholas Christian at Ragged Angel Investigations seeking information on the location of a cult gang he may have heard about—Nick calls them the Big Hoods. Then Harry takes him to Saint Mary of the Angels where Father Forthill tends to his physical needs: food, shower, rest.
He and Waldo Butters find Harry in his grave in Graceland. Father Forthill is in danger, Aristedes has him. Butters, Daniel Carpenter, Fitz, Bob, and Harry's ghost go to Aristedes's hide-out, fight him and free the boys and Forthill.
Fitz moment of truth presents itself when he is running away. Harry stops him and points out that since both Butters and Daniel are wounded, and Father Forthill is close to death and all the kids he's leaving behind will most likely die without him that he is everyone's last chance. And since Aristides himself is wounded and weakened, that this was his one chance to stand up to Baldy and win. And, if he ran now, he'd be running all of his life. So Fitz went back and stood up to the bully, got the kids to stand behind him against Aristides and Forthill was rescued and the kids were freed from the tyranny.
It has been noted that this odd combination of attributes, as well as a name that means bastard, imply that he could be the son of Tera West and Harley MacFinn, in which case Harry is the one that made him an orphan.