In the end of 1984 does Big Brother end up being a real person?
You can not be completely sure, but according to O'brien he is
I have experienced real love and real love is...real love is waking up to the person you love every morning and being totally happy, ringing that person every day just to see how their day is going, never wanting to let go of them! Love is an emotion that hurts and heals both the body and soul! Real love lasts forever.
The noun 'Greg' is a proper noun, the name of a specific person (real or fictional). A proper noun is the name or title of a specific person, place or thing. A common noun is a general word for any person, place, or thing. Examples of common nouns for the proper noun 'Greg' are friend, brother, person, etc.