Originally Kenji Kawai and Yoko Kanno were asked by Production I.G. to do the music, but both of them refused because their scheduling conflicts. Since Mamoru Oshii is a great fan of Hans Zimmer, he asked the German composer who also couldn't accept the offer, but recommended his friend Mark Mancina and Zimmer stayed as music producer and also wrote some themes for the series, essentially both composers scored theatrical films from Walt Disney Animation Studios, Zimmer scored The Lion King (1994) whilst Mancina became a recurring composer and scored features such as Tarzan (1999), Brother Bear (2003), and Moana (2016).
"Chevalier" is the French word for "knight".
There is a basset hound in episode 17, which is director Mamoru Oshii's trademark. He is credited as co-planner.
The American version of the series debuted on Cartoon Networks' "Adult Swim", March 10th, 2007.
A chiropteran queen's blood loses its power to crystalize shortly after it leaves their body. Which is why Red Shield can't weapons Saya's blood.