The hair of the girl in the back is neither pink like March 7th nor grey twintails like Karenina. Also the weibo commentary is only tagged Genshin Impact, Arknights and Girls' Frontline.

Arcana55 said:

The hair of the girl in the back is neither pink like March 7th nor grey twintails like Karenina. Also the weibo commentary is only tagged Genshin Impact, Arknights and Girls' Frontline.

Some asked who the girl in the back is, and another answered "Karenina" in the danmaku on Bilibili. March 7th and Yanyan appeared as posters on the wall, with March 7th's wanted poster being the version drawn by Pela. Additionally, the artist's commentary on Bilibili mentioned PGR, March 7th and Wuthering Waves (AI-assisted translation):

"Today the little monster, tomorrow Amiya the Donkey, the day after tomorrow the traveler, then a construct, and now you're eyeing March 7th and the bad woman from Wuthering Waves?"

Since the girl in question doesn't have twintails, add all the tags back except Karenina.