My system was like yours initially, actually there was a time we were all co-conscious, then we had another trauma & i lost years of memory (including memory of my alters) & we were all split up again. I lost time etc. Anyway... I then met Kerry (again) & we started talking, left notes in notebooks, on our palms etc. Slowly I re-met everyone & we're co-conscious again for the most part.
When me & Ker argue, she tends to 'detach' herself from me so I can't talk to her, but I always find a way to find her
If the little one can't write I think getting Claire to talk to her is a good idea. It can be totally overwhelming, but it's so worth it once you are co-conscious. Weird, but worth it.