Miyake Aoi features in the D4DJ franchise as leader of the DJ unit RONDO. She performs exclusively at "Alter-Ego," a longstanding members-only club. Her androgynous appearance draws a substantial fanbase, though she sometimes tires of their intense fervor. Captivated by Aoyagi Tsubaki’s vocals, she initiates RONDO’s formation.

Aoi maintains polite formality, using "-san" honorifics even for juniors. Typically reserved with an unreadable poker face, she slowly reveals genuine emotions around unit members. Despite her princely charm attracting female admirers, she neither exploits them nor acknowledges their affections. High school teasing over her feminine presentation—with remarks comparing her to "a boy crossdressing"—prompted her shift toward a masculine style. While affirming this suits her, she privately struggles with others imposing expectations on her self-expression.

Storylines explore Aoi’s evolving gender expression. She considers experimenting with feminine presentations like long hair or dresses but encounters dismissiveness from fans attached to her princely image. This creates inner conflict: she values her masculine aesthetic yet desires autonomy to explore identity without external pressure. Anxiety surfaces during a drama club performance as Juliet in feminine attire, though friends like Haruna offer reassurance. The narrative underscores her agency in defining self-expression positively.

Her dynamic with Tsubaki carries nuanced subtext. Romantic tension emerges through flustered exchanges and near-confessions consistently interrupted in game narratives.