- The series has the names 'Yuuko' and 'Okonogi'. If you know Dennou Coil, it will remind you of the anime's main heroine, Yuuko Okonogi a.k.a. Yasako. Interestingly enough, there is another 'Yuuko' in Dennou Coil: Yuuko Amasawa a.k.a. Isako.
- Fan Nickname: Yuuko is called "Ghost Yomi" in certain corners of the net. The anime aired during the same season as Sankarea, whose female lead Rea is similarly known as "Zombie Saten".
- Overtook the Manga: The first nine episodes are very loyal to the manga, but the anime goes in a somewhat different direction from episode 10 onward. It's a mild example, as it still sticks to the story and characters of the original manga.
- Talking to Herself: Both Yuuko and Shadow Yuuko are voiced by Yumi Hara, which makes sense since the girls are two halves of the same person. However, because Yumi uses a different and scarier voice for Shadow Yuuko, they sound like entirely different people.
- The Wiki Rule: Located here.
Trivia / Dusk Maiden of Amnesia