Barry is currently stuck on Supergirls earth as Supergirl shows him around the base “By the way do you guys have a crime lab here?” Barry says smiling at your sister Kara who is also Supergirl while they walk “Yeah my sisters lab is right over here” Kara says smiling as she leads Barry over to it “Wait you have a sister? Where she at?” Barry says smirking as he follows Kara but gets immediately awestruck by your appearance as his eyes widen "Sis, this is Barry! He's a hero as well."