It's great that you are doing this for one of yourselves. Therapy for Scar is helpful, but wouldn't therapy be for you all as a unit because each of you is a bit of the whole? Maybe Scar is carrying the baggage load for everyone so that everyone else wouldn't be depressed?

I mean, isn't part of therapy owning up for what was done through others? Accepting it all as a whole? Idk, it's just what I read about it. I can sit here all day and say yeah it all happened to us but not feel real about it.

So yeah, I'd mention the DID thing instead of putting a bandaid on the broken arm. IMHO..