I’m going to blow your mind !!! 
Recently i have been going over all the Gear info and even made a Gear FAQ for my website. When i was taking a shower somehow i was thinking about the request for a pet class and then it sparked my mind.
Pet Class can be obtained through Gear, AAAAAAAAHHHHHHHHHHHHHH!!!
So this let me to writing a whole blog about the Pet Class Gear.
But in a nutshell, some gear will have a drone that has certain abilities. Think in the direction of Wilhelm in Borderlands the Pre-Sequel. He had Wolf and Saint. So instead of having a +5% Buff damage output on your hero you get a drone that does more damage but has to fly towards an enemy and it can be shot down (drones have a respawn timer). Bit of Risk/Reward.
Speedy Drones that are fast and do minimal damage.
Normal Drones that are average.
Kamikaze Drones that do massive damage but have to respawn in order to attack again.
Healing or Shield restoring Drones that also helps allies.

