* A season 2 episode reveals that Barkhorn calls the dividing line between her orderly half of the room and Hartmann's TrashOfTheTitans half the ''Siegfried Line'', the name of the real-life defense fortifications along Germany's western border during World War 1.
* From the movie. Yoshika is being lectured by Shizuka on the importance of discipline in the military, and thinks that now she understands how Erica felt whenever Barkhorn lectures her. SmashCut to [[SneezeCut Erica sneezing.]]
* In the second season episode where Lucchini, Yoshika and Shirley go shopping, Yoshika holds up an impossibly girly dress that Gertrude would want for her sister. Shirley thinks it's for Gertrude herself and instantly has an ImagineSpot about it, only to burst out in uncontrollable laughter.