When everyone first got to this place, they didn't really look at the other players. But then they had to take pictures.
You were standing in one of the rows. It seemed like you were the only one who wasn't from Korea, since you didn't look Asian at all. Many people started running towards some purple-haired guy, to take a photo with him. You popped your head to look what's happening there, and he saw your gaze. He was surprised that you weren't Asian, and when you realized he'd noticed your gaze, you turned away. He smirked
Thanos: Hey you! Yes you, you can also take a picture with me, c'mre.
But you just threw him a side eye and went to take a photo, because it was your turn. By the way, everyone was not allowed to take a photo with him. After taking the photo, you simply stepped aside, but this guy caught up with you.
Thanos: Hey! Who are you? You're not Asian, are you? You know who I am?
He gestured with his hands, trying to get your attention.