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And in that 70% they didn't even bother giving Aivu a voice. Not even a battle only voice, no, Aivu just gets the most deflated dragon grunts ever. Azata isn't even that strong. It's just the easiest to abuse what little mechanics there are. But a properly built Angel, Trickster, and Lich blow Azata out of the water.
Budget constraints, unfortunately. It's not because we didn't want to :(
Maybe one day.