The phrase "guardian types" refers to people who are responsible, caring, and protective towards others. They are like guardians who always look out for and take care of those around them. Full definition
These dogs require firm consistent training from an owner who is experienced with guardian type dogs and understands their special needs. (dogs.animal-world.com)
You are able to mix and match the different guardian types as you see fit (once they have all been unlocked), and you will need to master how to utilize all of them in order to succeed. (pauseresume.com)
As you progress in the campaign, four additional guardian types are unlocked, providing you with ranged attacks, Anima - draining powers, and more. (videochums.com)