I see.
E08
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She does mention "daughters" again here, and that it can't be mass manufactured. I suppose the whole GUND thing is to give people's minds robotic arms and shit, so in a sense if Ericht is the person within Ariel then she's the actual ideal of GUND. For whatever reason they can't get her to move/talk/think independently without a pilot I'm presuming.
If it's not Isuzu-chan Mii~