Sapphíre,
Comfort and protect S'rydia. She is scared and not yet ready to face her fears. Keep her settled calm and distracted. Ideally see if Jake (or JC) can ensure S'rydia is safe and comfortable. Does S'rydia have a favorite, toy, song, activity, environment that helps keep her calm.
Find what S'rydia needs and let her have it. Distraction is the key. You all need time to figure it all out.
If your DID is like my daughters, you have an internal world where the alters live and interact. Try keep S'rydia from fronting for a while. If S'rydia has known positive or negative triggers, try avoid them for a while.
My daughter was taught about zones of regulation (blue-calm, green-alert, yellow-agitated, red-crisis). Each alter will be in it's own zone of regulation. S'rydia is likely in the red and in no state to deal with anything. She needs to be calmed before any progress can be made.
Only once an alter is in a green regulation, then work can be done on underlying issues.
The normal therapy for trauma is graded exposure, but this should be done with help, guidance and support. The exposure is graded enough to push the alter to yellow (and no further), but then allow self-regulation to get back to green. Repeated graded exposure allows more and more of the trauma to be gradually dealt with.
If the exposure too great (into red), the alter will retreat (flee) and healing will take longer. This is why professional help in this case is essential.
The main caution is against trying to progress things too quickly. Time right now is your biggest friend.
Only once an alter is in a green regulation, then work can be done on underlying issues.
41 alters to 6 is a huge change. Give this time to settle a little. Turmoil and confusion for a while during this stage is expected.
Please take care and keep reaching out for help.
Alasdayr.