Would a Mage of Mind be so socially awkward that they create their own personas to deal with daily situations and thus it's hard to tell their true self? Mages can of course suffer from anything relating to their aspect, but would this be a possibility?

Not a Mage, but we do have a Knight of Mind who uses her Rad Persona to try and look more chill than she actually is, so I could see a Mage doing that as well, specially given they’d have a better knowledge of how to actually pull of a good Persona as the situation requires.