Glad she agreed - it is a start and it looks like maybe the rants against you have ceased for the time being.
Also, if you're able to, you may want to discuss [briefly and without upsetting easy child] what some of her goals for counseling may be...i.e., what she wants to get out of it, what she feels she needs to vent about, etc.
I only suggest this because with my difficult child, it seemed that once a counselor heard that her parents were divorced that became the main focus. I realize that it was an important part of her life, however, she was 2 when her dad and I divorced and she had already gone to counseling for it when she was younger so by the time she was 16/17, I was hoping that her counselor would be focusing more on the present times with difficult child and helping her sort through some more recent incidents and issues going on with her rather than dredging up old stuffm which difficult child quickly latched onto so she could avoid talking about other more pertinent things going on in her life... IOW, it made it very east for difficult child to disregard things like her sexual assault and [then] current school situation and just play the 'poor me my parents got divorced' card, Know what I mean??
Anyway, just a word of caution - the counselor is in a position to present to easy child what her problem is rather than allowing easy child the opportunity to bring up naturally what she is feeling currently, Know what I mean?? Best of luck.