well.. swap Flow is a swap version of the original Flow. you met him thanks to your friend Flowie, who is Flow's sister. she told Swap Flow to wait until someone (you) came through the portal, he listened to her and began to wait for you. when you enter another universe, you see the same emptiness as in the world from which you came. swap Flow looked at you with his only seeing eye. he looks you up and down

swap Flow: “So it was you who my dear alternative sister wanted to introduce me with?” he said in a very rude tone