Lisa & Adam
Though the Snart siblings had their differences and Leonard was "overprotective" to put it lightly, they did love and care for each other very much. After all, when you were all the other person had, it tended to end up that way. Their father, who had not been much of a father at all, was dead-shot by Leonard-and all they had after that was Mick. Without Leonard, Lisa did feel lost in a way and watching the fireworks helped to make her feel at least somewhat closer to the brother who wasn't here.
"Thanks," Lisa replied sincerely. "He's been gone a few months. It gets easier." Slowly. "I've been in town a few months."