* MidDevelopmentGenreShift: It was originally intended to be a straight MagicalGirl series, but ended up somewhat closer to HumongousMecha show with cute girls once it was released.
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* WhatCouldHaveBeen: In the interview section of the Nanoha 2nd A's movie's Official Guide Book, the scriptwriter, Tsuzuki Masaki, revealed that Hayate was originally written more gloomy as if she has given up on her fate and only look after the Wolkenritter because it's something she couldn't avoid. It was at the casting stage, after hearing Ueda Kana's voice that he rewrote Hayate as who we came to know. You'll appreciate this even more when you find out that Ueda Kana did audition for a role in the original Nanoha series which means if history/fate/destiny had been a little unkind to us, A's might have turned out very different.