Living by the sea, protecting the sea, and journeying across the sea…They’re the BLUE MERMAIDS! Because of a shift in tectonic plates around 100 years ago, Japan lost much of its area to submergence. To preserve Japan’s territories, Coastal Cities sprung up, one after the other. Eventually, they became Marine Cities, and along with the expansion of sea-lanes to connect them, the need arose for a sizable staff to protect the seas. At the same time, maritime jobs were becoming more popular among women. Hence, the BLUE MERMAIDS had become every female student’s dream job.
| Writing | Takaaki Suzuki | Original Story |
| Visual Effects | Naoto Nakamura | Character Designer |
| Art | Hideyasu Narita | Art Designer |
| Visual Effects | Hitomi Ikeda | Color Designer |
| Sound | Hiroto Morishita | Sound Director |
| Visual Effects | Kenji Teraoka | Mechanical Designer |
| Visual Effects | Hiroshi Saito | Animation Director |
| Visual Effects | Raku Nishikimi | Animation Director |
| Production | Manabu Jinguji | Producer |
| Sound | Shigeo Komori | Original Music Composer |
| Writing | Kunihiko Okada | Screenplay |
| Writing | Takaaki Suzuki | Screenplay |
| Art | Chihiro Okawa | Background Designer |
| Art | Minami Kasuga | Background Designer |
| Art | Kazuo Ogura | Background Designer |
| Art | Hiroko Tanabe | Background Designer |
| Art | Ayano Okamoto | Background Designer |
| Art | Shingo Kanai | Art Direction |
| Art | Shingo Kanai | Background Designer |
| Art | Ayako Kono | Storyboard Artist |
| Art | Hisashi Higashijima | Prop Designer |
| Sound | Sora Amamiya | Theme Song Performance |
| Sound | Momo Asakura | Theme Song Performance |
| Sound | Shiina Natsukawa | Theme Song Performance |
| Camera | Kojiro Hayashi | Director of Photography |
| Visual Effects | Kazuchika Kise | Key Animation |
| Visual Effects | Miko Nakashita | Key Animation |
| Visual Effects | Teruaki Tokumaru | Animation Director |
| Visual Effects | Teruaki Tokumaru | Key Animation |
| Visual Effects | Chiharu Sato | Animation Director |
| Visual Effects | Chiharu Sato | Key Animation |
| Visual Effects | Raku Nishikimi | Key Animation |
| Visual Effects | Hisashi Higashijima | Animation Director |
| Visual Effects | Naoto Nakamura | Supervising Animation Director |
| Art | Chiharu Sato | Storyboard Artist |
| Art | Masakazu Obara | Storyboard Artist |
| Directing | Ayako Kono | Second Unit Director |
| Directing | Chiharu Sato | Second Unit Director |
| Visual Effects | Keisuke Watanabe | Animation Director |
| Visual Effects | Keisuke Watanabe | Key Animation |
| Visual Effects | Ryota Kuratani | Animation Director |
| Visual Effects | Saki Hisamatsu | Animation Director |
| Visual Effects | Keita Hagio | Animation Director |
| Visual Effects | Takeshi Matsuda | Animation Director |
| Visual Effects | Mugi Ishikawa | Animation Director |
| Visual Effects | Minami Konagai | Animation Director |
| Visual Effects | Eri Sano | Animation Director |
| Visual Effects | Michinori Shiga | Animation Director |
| Visual Effects | Tatsuro Nagai | Animation Director |
| Visual Effects | Masayuki Fujita | Animation Director |
| Visual Effects | Lee Dong-uk | Key Animation |
| Visual Effects | Eri Sano | Key Animation |
| Visual Effects | Hideyuki Motohashi | Key Animation |
| Visual Effects | Katsushi Morita | Key Animation |
| Visual Effects | Yu Saito | Key Animation |
| Visual Effects | Satoru Yamashita | Key Animation |
| Visual Effects | Takeshi Matsuda | Key Animation |
| Visual Effects | Hisashi Higashijima | Key Animation |
| Visual Effects | Ryota Kuratani | Key Animation |
| Visual Effects | Hitomi Sato | Key Animation |
| Art | Lu Yao | Background Designer |
| Art | Kenta Tsuboi | Background Designer |
| Art | Atsushi Yokoyama | Background Designer |
| Art | Hiromichi Ito | Background Designer |
| Art | Ayu Kiyoki | Background Designer |
| Art | Yuki Umino | Background Designer |
| Art | Yuan Wenshu | Background Designer |
| Crew | Noriko Masuko | Special Effects |
| Sound | Kyohei Akezuma | Foley Artist |
| Production | Tomoyuki Ohwada | Producer |
| Production | Goro Ishida | Producer |
| Production | Shinichiro Kashiwada | Executive Producer |
| Production | Masanori Miyake | Executive Producer |
| Editing | Mitsuna Fukasawa | Online Editor |
| Editing | Kazuki Kiyohara | Online Editor |
| Editing | Kasumi Watanabe | Online Editor |
| Art | Ayumi Okano | Assistant Director of Photography |
| Sound | Takashi Shibata | Sound Mixer |
| Sound | Yuji Furuya | Sound Effects |
| Visual Effects | Hiroshi Saito | Key Animation |
| Visual Effects | Saki Hisamatsu | Key Animation |
| Visual Effects | Keita Hagio | Key Animation |
| Visual Effects | Hisashi Isogawa | Key Animation |
| Visual Effects | Hiroo Nagano | Key Animation |
| Visual Effects | Masaya Sekizaki | Key Animation |
| Visual Effects | Shinichi Yoshikawa | Key Animation |
| Visual Effects | Yoshio Chizaki | Key Animation |
| Visual Effects | Yuko Hariba | Key Animation |
| Visual Effects | Katsushi Suzuki | Key Animation |
| Visual Effects | Kyoko Yamaji | Key Animation |
| Visual Effects | Ryosuke Kuwahara | Key Animation |
| Visual Effects | Yuichi Ichihashi | Key Animation |
| Visual Effects | Kim Bo-min | Key Animation |
| Visual Effects | Michinori Shiga | Key Animation |
| Visual Effects | Takahiro Ninagawa | Key Animation |
| Visual Effects | Ryo Saito | Key Animation |
| Visual Effects | Yu Matsuno | Key Animation |
| Visual Effects | Satoru Koshiishi | Key Animation |
| Visual Effects | Suguru Iijima | Key Animation |
| Visual Effects | Hiroko Shigekuni | Key Animation |
| Visual Effects | Maki Sawai | Key Animation |
| Visual Effects | Naoko Shokin | Key Animation |
| Visual Effects | Mizue Ogawa | Key Animation |
| Visual Effects | Rie Arakawa | Key Animation |
| Visual Effects | Fujio Inose | Key Animation |
| Visual Effects | Koichi Takai | Key Animation |
| Visual Effects | Masaru Yoshioka | Key Animation |
| Visual Effects | Shouta Yoshida | Key Animation |
| Visual Effects | Kim Yeon-hee | Key Animation |
| Visual Effects | Tomoyuki Munehiro | Key Animation |
| Visual Effects | Kazuki Ito | Key Animation |
| Visual Effects | Kei Oohashi | Key Animation |
| Visual Effects | Yoshitaka Sato | Key Animation |
| Visual Effects | Kotaro Okazaki | Key Animation |
| Visual Effects | Shiori Tanaka | Key Animation |
| Visual Effects | Sue Ikezu | Key Animation |
| Visual Effects | Hiroki Abe | Key Animation |
| Visual Effects | Minami Konagai | Key Animation |
| Visual Effects | Soichi Honda | Key Animation |
| Visual Effects | Ruriko Watanabe | Key Animation |
| Visual Effects | Wakako Yoshida | Key Animation |
| Visual Effects | Akisa Eguchi | Key Animation |
| Visual Effects | Shohei Sakai | Key Animation |
| Visual Effects | Yuko Yamamoto | Key Animation |
| Visual Effects | Shouko Muroyama | Key Animation |
| Directing | Yuu Nobuta | Series Director |
| Production | Jun Katou | Production Supervisor |
| Production | Kenshiro Yamada | Production Supervisor |
| Production | Yuuta Hayashi | Production Assistant |
| Visual Effects | Yuki Ito | Key Animation |
| Visual Effects | Masami Yamashita | Key Animation |
| Directing | Jun Nakagawa | Director |
| Directing | Jun Nakagawa | Second Unit Director |
| Art | Jun Nakagawa | Storyboard Artist |
