What's it like to photograph a cosplayer in the middle of a crowd of people?

2021 Chengdu Worldline Comic Con 5.1
There were definitely more people around the young lady then than there are now liking this video (:3 ⌒ﾞ)
There were so many people that when I left this young lady hadn't taken a step ╮( -́ω-̀ )╭