this companion currently doesn't have any on-click vocalizations, but this is still the PTR so that may change. it's a little bit shorter than lil' xt, and when it walks it makes a rumbling noise (it almost sounds like faint thundering or a drum roll). it stretches its arms forward, clasps its hands together, and faces its palms outward in a "cracking knuckles" fashion when idle.
also... is it just me or does it look a little like a stone golem wearing a loincloth? lol :P