gundam witch ep 6 discussion/spoilers
So I think Aerial's designed to be a Gundam-killer.
The biggest thing that makes me think this is the panic burst that Aerial releases when the Pharact is closing on it:
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This reminds me a lot of another attack that we've seen before that also disabled GUND-Bits, even though it looks slightly different:

This definitely feels like an improved version of Beguir-Beu's link suppression field that disables GUND-Bits but also tampers with the pilot's link to the main body? That'd explain why Elan sees Aerial and the Bits as spirits. I'm really excited to see where this ends up!