Draenei Micro Defender

Source
The Draenei Micro Defender can be bought from Vindicator Nuurem in Stormshield at a cost of 1,000 gold and 2,000 Apexis Crystals upon reaching Revered reputation with Council of Exarchs.

Pet Journal
While these tiny mechanical guardians were created to protect domesticated elekks from pests, they also turned out to be really good at giving back massages.

Trivia
The pet is a vigilant, a mechanical construct from the planet Argus.