- Anime First: Played straight and inverted. While the anime is the first of the three main projects to be released, it has its own one-shot manga that came out before it.
- Crossdressing Voice: Akira is the only guy on the island but he is voiced by a female seiyuu. This is one of the hints about his true gender.
- Fan Nickname: Health & Fitness for Kouzuki and Miyasato, Jewloli for Meifong, and TOKONOME (in all caps) for Mamori.
- "Do It Yourself" Theme Tune: The opening is sung by Hitomi Harada (Momoka), while the ending is sung by Yuka Iguchi and Mikako Izawa in character as Mirei and Mamori.
- I Knew It!: A lot of fans have assumed that Akira is also a female due to his androgynous appearance and his feminine voice months before the anime aired. And they were right all along.
- Playing Against Type: Yuka Iguchi tends to voice characters with high pitches. Unlike the deep-voiced Mirei.
- What Could Have Been:
- Hitomi Harada was offered Mamori's role at first, she thought it didn't fit her and auditioned for Momoka instead.
- During planning Meifong was considered to be a chubby and lazy girl but this was scrapped in favor of her final design. Her rejected design however, was retooled into a new character, E9.
- The commentary for Episode 12 states that Momoka was supposed to die in the final fight against Mirei and Mamori but everyone on the staff grow fond of her and rewrote the climax so she would survive.
Trivia / Valkyrie Drive: Mermaid