Quinn was a Praetor and a loyal follower of Darrow. She was Darrow's classmate in House Mars at The Institute. During The Institute, her and Cassius were romantically affiliated. At some point during Cassius' time as Primus, she left him for Roque. Their relationship develops further in Golden Son.
Quinn was fatally punched by Aja during a failed operation. Her death caused Roque's grief and planted the seed of doubt in him with regards to Darrow's leadership, which subsequently led him to betray Darrow and denounce his cause.
She is described to have long, thick legs and was one of the fastest runners in House Mars. One of her ears was cut off during her time in The Institute.