Caitlin Snow & Leo Valdez
Honestly, his response surprised Caitlin, probably because back home most people found her freezing powers (outside of Captain Cold) terrifying. Even Caitlin found them scary at times despite having a slim bit of control over them. Only Killer Frost seemed completely confident and in love with them, but Caitlin did suspect she sometimes despised them given how they did keep her separated from others physically and mentally.
Then he mentioned everything about his world and Caitlin understood the reaction. He came from a place where people had abilities like hers. It made sense he would find it cool. She watched, mentally keeping herself from reacting, as he summoned fire to his hand and than extinguished the flames. It obviously drew some stares and Caitlin was a bit worried about the display in such a crowd, but nothing happened.
"Uh, I guess I am in a way," Caitlin finally replied. "You're kind of like my husband was. He could weld flames like that in a way. I mean I don't know enough about your powers, but that seemed similar to what he could do."