~Tarō Mitsuki (海月 太郎 Mitsuki Tarō?)~

Tarō Mitsuki (海月 太郎 Mitsuki Tarō^?)

Voiced by: Daisuke Kirii

Tarō is Lucia's music teacher and Hanon's love interest (she refers to him as 太郎ちゃん, Tarō-chan). He had met a mermaid in the past (Sara), and made a piano piece for her, not knowing what happened to her after their last meeting.