Hey, SCoates. Good to see you back again.
Well, once again we are in the grammar mode, I guess.
In this case, "is" is called a linking verb, i.e. it connects the pronoun after it with the subject of the sentence. They are one and the same. I, frankly, think that usage is a little stilted, but it really is the purist form of grammar. Best thing to do, buddy, is to point at someone and say, " That is Chris." That way, you can avoid searching around for the proper pronoun.

Actually, I'm pro choice.