Ai emerges as a young patron during Akari’s apprenticeship, sparking a bond that flourishes into a sustained epistolary exchange. Their letters chronicle Akari’s Undine journey in Neo-Venezia, nurturing Ai’s fascination with the city’s enchantments. As Akari ascends to Prima, Ai shifts from an admirer of Undine culture to an eager novice, joining Aria Company as her protégée.

Her evolution reveals a deepening grasp of an Undine’s duties and delights. Training under Akari, she adopts her mentor’s cheerful outlook, cultivating an eye for Neo-Venezia’s quiet marvels and serendipitous moments. Bonds with peers Azusa and Anya, apprentices from competing gondola firms, echo Akari’s cross-generational camaraderie, illustrating Ai’s talent for bridging divides through empathy.

During Acqua Alta, Ai proactively unites her preoccupied mentors for a reunion, showcasing her grasp of communal ties and the significance of collective memory. This pivotal act mirrors her growth from a beneficiary of Akari’s wisdom to a cultivator of relationships, weaving threads between veteran and novice Undines.

Like Akari, she frequently brushes against the mystical—encounters with entities like Cait Sith affirm her role as a inheritor of legacy, perpetuating the art of uncovering magic in mundanity. While her physical stature remains unchanged in primary stories, subsequent arcs depict her fully inhabiting her trainee identity, embodying the perpetuation of Undine traditions.

Once confined to anime adaptations, Ai later anchors herself in manga canon, featured in concluding chapters and art as Akari’s chosen successor. This narrative consolidation cements her role in the saga’s meditation on mentorship’s enduring ripple effects and the intergenerational passage of wonder.