Thank you! I actually had emailed the PI to see if she was planning on mentoring grad students, and she asked to a set up a time to chat (so more informal).
I hope you hear something soon!
Hello, I was recently accepted as well!
The way it worked for me is that I had a conversation with the PI that I wanted to work with back in October, and then met with her current grad student a month or so after that. The PI sent me an email yesterday letting me know that I had been accepted and that the official letter would come my way soon!