PET
P.E.T. or Personal Electronic Toy is special gear, designed as your companion, which can provide you some additional buffs and makes your kits/buffs activate automatically.
Upgrading
There are currently 3 Tiers of PET:
V-1 for level 50
V-2 for level 100
V-3 for level 105
All can be upgraded to higher version using corresponding PET Upgrade Card and additional Pet Upgrade Fragment Cards.
E.g. You want to craft PET V-2.
Basic Crafting requires your PET V-1 and PET V-2 Upgrade Card. That has only 50% chances of successful craft.
You can get better percentage by adding PET V-2 Upgrade Card Fragments. You can add maximum of 30 pieces, which will give you 80% successful crafting percentage.
The same thing goes for upgrading your PET from V-2 to V-3, using V-3 cards. Tho, the maximum PET V-3 Upgrade Card Fragments you can add is 20, changing the craft from basic 30%, to maximum 50% successful crafting percentage.
Sockets
Auto kit/buffs are earned from missions, they can also be bought from the credit store if you wish