Hi and welcome :)
I do IFS as well, and also have a strong victim part. She used to be stronger to be honest, still comes out and takes over once in a while but not as much as before therapy and I do have a stronger grip on the system's behavior.
I don't know where you are in terms of process in therapy, but we do learn how to unblend. And the focus of therapy is, should be anyway for us, to let the Self lead. Once we start to unblend more often out of the victim part, we become more focused in recovery.
If you want to be partially blended (I assume with you being 16 you still have a strong connection with your abuse, so it's difficult to unblend completely, I totally understand that), you can always start a conversation with that part that is protecting your exile or exiles, and work with that part for the benefit of the whole system, instead of just themselves.
The thing about the victim part is that they tend to attach themselves to firefighters that will look for other forms of victimization as coping mechanisms, hence perpetuating abuse in your life, being a victim is all they know.
I really urge you to unblend a bit from that part that you call your identity, to figure out if you do want it to be your real identity.
Gentle hugs.
