I'm on Episode 5, but so far with the exception of one character, all the other named characters start with あ, like Aika, Akari, Alice, Ai, Allan.
This seems to be done on purpose because the Undine who's training Aika in Himeya is named Akira when it could have been easier to give her a different name so as to not confuse her with Akari who Alicia trains.
It also seems to not be limited to Undine or their customers because Akatsuki is a Salamander.
So is it on purpose that all the characters are named starting with あ? If so, why? And why is the Sylph from Episode 4, Woody, the exception?