Aika S. Granzchesta

Aika S. Granzchesta is the first friend Akari made on Aqua and serves as an undine for Himeya, the second-ranking water-guide company in Neo-Venezia. As the only daughter of its owners, she is the heir but dislikes the attention it brings. Aika is known for her blunt manner and competitive spirit regarding her undine skills, and she shares a close bond with Akari despite their contrasting personalities.