my non professional opinion would be first to ask whether this "caretaker" was an alter or was he a hallucination.

I did have a protector, caretaker hallucination otherwise known as my invisible friend. because having invisible friends are ruled out when diagnosing dissociative disorders my treatment providers treated this situation as harmless childhood fun and possible psychosis, they put me on some meds and my invisible friend hallucination (not related to being an alternate personality) went away so they determined it to be psychosis in me, another invisible friend / hallucination "caretaker" did not go away with meds but was not an alternate personality so they considered this one to just be harmless she needs a friend and in her mind created an invisible friend to take care of her situation.

where as my protector/caretaker alternate personalities well they had their own way of being, their own job, purpose, reason for being that affected my life in all areas like academic, occupational, social....so treatment for having this was not a hallucination/invisible friend situation and required years of therapy. once I was able to handle those things this alter took care of for me, that alter integrated/became one with me, as one whole person again.

your question could it be a caretaker? only your treatment providers can say what this "caretaker' is with in you and what to do for and about it. we cant ell you whether we had the same situations but cant tell you anything else like whether this is a caretaker or protector alter or a hallucination.

my suggestion if you really want the answer to what this "caretaker" is contact your treatment provider.