I'd say generally quite squishable. My tail's probably not far off a mini blåhaj,1 just a little more rigid. Other limbs in the same ballpark. The wings don't have anything to keep them rigid, and the stitching keeping them attached came undone before I claimed myself as my vessel.2 As for the ears, I guess there's something, given their height and lack of appreciable stuffing, and that they sit upright when I'm not inhabitting my body.
'Cause when I'm in my anthro form, or any variant thereof, everything gets animated in a way that makes the actual physical structure less important. Most obviously with my wings floating around a few inches from my back, or my embroidered eyes being able to look around and blink.
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I tested our mini blåhaj, Morgan, to check.
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Pronouns get weird when talking about ensoulment.