"The Hedgehog Can Never Be Buggered at All" is among Nanny Ogg's favorite songs, while simultaneously a reference to Neon Genesis Evangelion's own discussion of the Hedgehog's Dilemma. The TV Show where the statement is made is an Expy of Look Around You.
The narrator notes that while regular firepower doesn't do much damage against the Angels, a viable option in the event of failure would be to ''Use more gun."
Rury may be a reference to Ruri Hoshino, both sharing her name (in a suitably Nazzadi-altered form), being a product of genetic manipulation and displaying a tendency to thank their AIs ("Thank you, Omoikane", "Thank you, COEUS", anyone?).