T'Challa and Nebula
She had memories of a timeline when half the unierse was turned to dust and there had been nothing she could do to stop it. She and Stark remained on Titan while everyone else with them had been burned away to ashes.
"I recall something similar, though I wasn't in New York at the time and I..." Nebula paused and looked out to the water. "I was one of the survivors."
Then she gave herself a mental shake and turned to face T'Challa again. "He is from this city, is he not? Barnes, the Wolf? He is... good company." Though, apparently, he wasn't attending this celebration. At least, she hadn't found him yet.