I know part of the story but I don't know exactly what happened. Phillyfan was one of Emiru's earliest stream friends/mods that stuck around for years and ended up hanging out in person. Bonbi joined Emiru's discord group in 2019 or 2020, and befriended Emiru's friends. Philly became one of her closest friends at some point, probably after she broke up with her boyfriend and was able to get closer to Emiru's group.
Then at some point at Emiru's house, presumably when Emiru wasn't around (maybe when she was in LA or Austin in November 2021 or maybe even later in January) something happened between Bonbi and Philly. I have no idea exactly what happened but she later referred to it as sexual harassment.
There were some references to that friend group breaking up in early 2022 based on vague things mentioned by Emiru in 2022, and even in Bonbi's last stream she brought up how she destroyed a friend group when she was a teen. Throughout 2022 Bonbi hinted that a friend did something terrible to her and another friend wasn't taking her side. It all sounds vague until it culminates in late September when she publicly calls out Emiru in an instagram story and in Tiktok comments because of Emiru's Mizkif-defense stream after his involvement in the drama with Adrianah Lee blew up.
Then only a day later she had a crying stream which was essentially an apology to Emiru (an apology to her in her own words which she said on a later stream) for making personal issues public. After that she became "friends with Emiru again" after not talking to her for months. Philly was never seen again or name dropped on Emiru's stream but he's been seen in her discord over the years.
That's the extent of my knowledge on what happened. If you're curious about her being groomed by Emiru: nearly the same thing happened where she talked about it on stream for months until it blew up. Since then she stated that it was actually someone else and she's become friends with Emiru again. It's been about a year since and they're still talking.