Caitlin & Rosa
It was good Barry was here. If...if things went bad and Killer Frost reared her frosty head, there was someone here who could bring her back...or put her down. She knew the latter probably wouldn't happened; even when she'd nearly killed Barry, Cisco, and Julian, they hadn't been able to kill her or even fight back really. They still saw Caitlin, but it had taken Cisco nearly dying in order to bring her back from the edge last time. It left her thinking what would it taken to bring her back if she fell again? Someone actually dying? No, she didn't want to think about any of her friends dying or anyone in order to spark her humanity within again.
But Rosa was introducing herself and Caitlin returned it with a genuine smile and nodded. "It's good to know you, Rosa," Caitlin replied softly. "How did you meet Barry?"