Is it legal for Canadians to use titles like "prince" or "princess" even if they're not members of the Canadian (British [Danish {German}]) royal family?

i like to larp as a warrior monk or a particular field marshal. i am very emotionally and mentally mature, not sure if that is relevant. my mental health is matched only by my physical prowess, this creates a harmonious tension, like a bow or a lyre. did i mention my mental wellbeing, that's really important to me.