- Tokyopop licensed the manga; ADV Films licensed the anime. Both have expired, though the latter has been re-licensed by Sentai Filmworks (ADV's successor, ironically enough), while the manga was re-licensed by Dark Horse Comics.
- All-Star Cast: The anime somewhat approaches having this, featuring seiyuu both well-known at the time (Kotono Mitsuishi as Shouko, Kikuko Inoue as Shuuko, Tomokazu Seki as Ogata, Houko Kuwashima as Sai, Yuri Shiratori as Hatoko, Masaya Onosaka as Icchan, Yui Horie as Hiromi Fujimori and Kappei Yamaguchi as one-shot character Ryou Misaki, and a number of up-and-comers who eventually gained stardom in their own right: Soichiro Hoshi as Oujiro, Jun Fukuyama as Kotarou, Ayako Kawasumi as Kaede, and Kana Ueda as Ringo.
- Name's the Same: Ichiro Mihara is also the name of the vice president of real-world game developer Arika. Counts as a Shout-Out since CLAMP know Mihara personally.
- So My Kids Can Watch: Some of the English voice actors signed onto the project for this reason after being in violent series like Noir.
Trivia / Kidou Tenshi Angelic Layer