II. One
They were one, because it was Karma and Karma was a gravitational center. Amy's world evolved around the redhead friend and it was extremely hard to say no to her.
They were one in that gymnasium telling the world that they were a thing. One only thing that sent Amy's world spinning around in confusion and comprehension at the same time.
Such a shame the awe in Karma's eyes wasn't the same as the one in Amy's.