Aza Holmes is the 16 year old protagonist in Turtles All the Way Down. She suffers from obsessive-compulsive disorder (OCD) and has a particular fear of the microbacterial infection C. diff. She consistently reopens a wound on her finger, in fear of a bacterial infection, and applies hand sanitizer constantly. Though her ongoing combat with her mind makes her a bit socially awkward, she has 2 very close friends: Mychal Turner (an aspiring artist) and Daisy Ramirez (a Star Wars fanfiction writer).