Aquarius 01
Aquarius (アクエリアス Akueriasu?) appears in the form of a young mermaid holding an urn, which can unleash massive torrents of water on her targets. She is considered by Lucy to be the most powerful spirit in her possession, but can only be summoned near bodies of water. She is extremely rude towards Lucy and oftentimes targets her instead of her opponents, who are only "unintentionally" washed away by Aquarius's attacks. Aquarius also occasionally refuses to help Lucy in favor of spending time with her boyfriend, Scorpio, and likes to tease Lucy over the fact that she is single. She is one of the spirits previously owned by Lucy's mother. She is voiced by Eri Kitamura in Japanese and Jessica Cavanagh in English.