I had lots of people inside that didn't have a clue what food, clothes, music, or other things in the "outside world " were. They were not there for those purposes.

They were there for internal safety mechanisms that were critical to my well being and were not supposed to know those things. Other people inside took care of those things for them if needed and covered for their lack of knowledge.

For whatever reason your alter didn't know and that is perfectly okay.

One of the best tools I learned in therapy was to let each person know that it was okay to for them to know whatever it was that they knew, and to tell them I was proud of whatever they did. (whether or not I knew what their job was) I knew enough to know they helped to keep me alive and that was enough.

I hope this helps.

Tell the sad one I am sending hugs if they are acceptable.

if not then whatever good thing is.