Jodie Hayward's outfit in episode 21, a green cloak and a sniper rifle, is a homage to Chloe from Noir, and the sniper Limelda Jorg from Madlax. In all three cases, this cloak-wearing character was voiced by Aya Hisakawa.
Goof: The cover of the romance book "Prayer Prayed to You" reads that its author is Howard Heisman, yet in an earlier episode (6), a different author is written there instead.
Even though the show is rated TV-MA, the English dub continues to substitute for language, using "pre-vert" and "What the frak".
We learn in this episode that the story takes place in 2009, since Nastarsha mentions that her cat Chappy died "last year" and later on we are shown Chappy's gravestone that states it dies in 2008.
The red shoes Illis Gonsalez owns in this episode have also been seen in the previous anime shows produced by Bee Train, Noir and Madlax.
In all three shows, their respective owners (Kirika Yuumura, Margaret Burton, Illis Gonsalez) are voiced by Houko Kuwashima.
In the English dub, when Nadie is at the store and notices a guy staring at her from the window, she says prevert instead of pervert.
Goof: The cover of the romance book "Prayer Prayed to You" reads that its author is Violet Waras, yet in a future episode (18), a different author is written there instead.