藍華·S·グランチェスタ

The first friend Akari makes on Aqua, Aika is 16 when they meet. Aika is a Pair and then Single at Himeya Company. She is the only daughter and heir of Himeya Company's owners, but does not enjoy the distinction as she feels the company's employees fawned on her too much. Aika speaks bluntly and often responds to Akari's idealistic comments with "Embarrassing remarks are not allowed!" (恥ずかしいセリフ禁止! Hazukashii serifu kinshi!). Despite their contrasting personalities, she gets along well with Akari and Alice, but frequently squabbles with her mentor, Akira, whom she resembles. Aika considers herself reliable, especially compared to distractible Akari and antisocial Alice, but both her friends call her a crybaby for her tendency to tear up when emotional. She is proud of her gondola skill as an undine, and can be very competitive about it. She also greatly admires Alicia, and finds any excuse to visit Aria Company—and once tells Akari that if not for her family obligations, she would have joined Aria Company.