Trait Categories

'Rewarded Traits' are traits that can be earned via XP gain, purchase through the store, etc.
You can choose to equip these to your Arkaine when you are ready. Often, these traits will require a Design Resubmission.  

'Free Traits' are traits that any breed of Arkaine can pick up at any time.
These usually include body modifiers and cosmetic changes. 

'Breed Base Traits' are freely given traits that you can choose to pick up for your Arkaine, per their breed. 
They are breed-specific, so pay attention!