>Presumably the Fusovite (demonyms are hard) witches have giant brass
>instruments protruding from either side of their head.
That... wasn't actually radar, so I don't think it counts. Although I suppose there is the possibility of witches with super-hearing, in much the same way that there are a few with superhuman vision (like Mio and, in fact, Heidemarie Schnaufer, who can see in the dark in addition to her magic radar). That would probably not manifest itself visibly, though, alas. :)
Demonym-wise, I've been going with "Fusōnese", by analogy with both "Japanese" and certain island demonyms where the name of the place ends with a vowel, such as "Javanese", where the "n" is just there to make it flow a little better.
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