Aroma is a fairy from Hope Kingdom and serves as Pafu's older brother. Both journeyed from their homeland specifically to seek the Princess Precures. He accompanies protagonists Haruka Haruno, Minami Kaidō, and Kirara Amanogawa to Harmonia, the country of song and dance, to participate in its spring carnival. During the festival, Aroma, alongside other fairies, gets captured by antagonists Odoren and Utaen. This act triggers significant disruption at the carnival and initiates the narrative's central conflict.

The separation of the fairies from their partnered Precure warriors forms a critical plot obstacle. Aroma's captivity directly contributes to the ensuing chaos, hindering the Precure team's effectiveness and enabling the villains' scheme. His capture, along with the theft of the warriors' transformation items, forces the Precure to find alternative solutions.

Following the conflict's resolution and the defeat of Odoren and Utaen, Aroma is successfully rescued alongside the other captured fairies. His presence appears solely within this specific film narrative.