good questions:

Pholirites have Heterochromatic eyes (I just learned that word the other day), which means they have a different color in each eye, sorry for confusing you.

Cyborgs can indeed use magic, like every class. Remember, unless it's specific to one class, anyone can learn it. I'll let you know if you're trying to learn something you can't, or you can ask me. Freelancers, however, cannot use implants. Those are specific to Cyborgs.

A character can indeed use only the Interprate system (I decided the other name was too long, so I'm calling it the Interprate System or just the IS from now on) to make their entire spell list, but it's hard to control, and even when the spells are finished the cost to use them is much higher than a normal spell.