Companion Specializations
Ambusher
Source Tech Core pg. 74
In your companion's natural environment, it can use a Sneak action even if it's currently observed. Its proficiency rank in Stealth increases to expert (or master if it was already an expert from its type), and its Dexterity modifier increases by 1. Its proficiency rank for unarmored defense increases to expert.
Bully
Source Tech Core pg. 74
Your companion terrorizes foes and pushes them around the battlefield. Its proficiency ranks for Athletics and Intimidation increase to expert (or master if it was already expert from its type), its Strength modifier increases by 1, and its Charisma modifier increases by 3.
Daredevil
Source Tech Core pg. 74
Your companion joins the fray with grace. It gains the deny advantage ability, so it isn't off-guard to hidden, undetected, or flanking creatures unless such a creature's level is greater than yours. Its proficiency rank in Acrobatics increases to master, and its Dexterity modifier increases by 1. Its proficiency rank in unarmored defense increases to expert.
Racer
Source Tech Core pg. 74
Your companion races. It gains a +10-foot status bonus to its land Speed, swim Speed, or fly Speed (your choice). Its proficiency in Fortitude saves increases to legendary, and its Constitution modifier increases by 1.
Tracker
Source Tech Core pg. 74
Your companion is an incredible tracker. It can move at full Speed while following tracks. Its proficiency rank in Survival increases to expert (or master if it was already an expert from its type), and its Wisdom modifier increases by 1.
Wrecker
Source Tech Core pg. 74
Your companion smashes. Its unarmed attacks ignore half an object's Hardness. Its Athletics proficiency increases to master, and its Strength modifier increases by 1.