I'll start with a not so very old one: Chiaki/Lily. She appeared on /r9k/ in 2020, joined Sheep Village soon after, made friends with lonely incels just so she could break their hearts when they realized she was a liar. She used to tell them she loved them and that she only talked to them exclusively (like, just one of them) + a gay friend, but she was talking to them all at the same time and saying the same things to them all. Also, some people suspect her pictures were all edited and she's actually ugly.
What are some other forgotten e-girls?