Personally, I think the Au Ra will be comfortable in their own skin. I can see someone who ICly suddenly becomes one having issues, but they aren't alien to their own body. Even though they are foreign to all the other races; they aren't foreign to themselves because they grew up among their own kind probably and have had lots of years to grow out of the awkward stages. Accidents might happen occasionally, but very little elsewise. Like a miqo'te with its tail and ears, or Roegadyn and Lalafell in their size.
Also the Horns are part of their hearing so I am pretty certain they are very aware of them entirely and they aren't brittle.
Also the Horns are part of their hearing so I am pretty certain they are very aware of them entirely and they aren't brittle.