i don't have experience like that per se, but i did have one in the last year or so become more active after a random trigger which led to the whole system which had been quiet for years to become active again.

after several months, i began to learn things about him. he was associated with rage and was the only one who seemed to cause a few seconds of blacking out while he came out, yet i was co-conscious with him and just was confused about what would happen. usually, he acted out towards others or self harm (biting or scratching arms, etc.)

during a dream that involved several other alters, he was in it, and i was then able to see his face for the first time. he didn't have a name yet. then one day, a song came on the radio that he liked, and he came closer to the surface for a bit. it was the first time i had really felt him or anything other than how he was previously for years. a few days after that, he chose a name that he liked. i think putting all of that together allowed him to resolve that rage somehow. i am not sure why or how. it seems that when things come together, it helps each part in really big ways.

i hope that you are able to sort things out over time. it can be a long process and seems to be more when the others are ready no matter how much we want to know now. i keep forgetting that...that it is in their time, not necessarily ours.