Athena Liu acts as a foil to June in *Yellowface*. She is a successful author and the object of June's jealousy. Although she plays a limited role in terms of physical presence, Athena's achievements and haunting influence significantly impact June's narrative and perceptions.

Candice Lee emerges as June Hayward’s secret antagonist in *Yellowface*. Initially introduced in relation to the sensitivity reader conflict, she later plays a significant role affecting June's career. Portrayed by June as a villain, Candice becomes a mirror for June, exposing the desperation within the publishing industry.

Geoffrey Carlino, as Athena Liu's ex-boyfriend, interacts with June in *Yellowface*. He oscillates between being an antagonist and ally to June, ultimately serving as a cautionary figure through his own downfall in the publishing world.