Hi tara-
based that this is a third person dream (twice removed), it's hard to gage since information could be missing and it may not even be about your mutual friend at all depending on what's going on in her life. But, if I were to base the dream as if it pertains to your mutual friend on what you have written I would say your friend's friend who is an EMT is a caretaker. Seeing her friend injured in her dream, which happens to be along the lines of her volunteering or career, and she could not stop the bleeding would tell me your friend's friend might wish she could take the pain or fix the problem your friend is going through. But this is something only your friend can do.
Let put this in English so it doesn't appear so convoluted! I'm giving them both names so you can follow in case it was confusing.
based that this is a third person dream (twice removed), it's hard to gage since information could be missing and it may not even be about your mutual friend at all depending on what's going on in her life. But, if I were to base the dream as if it pertains to your mutual friend (Mary) on what you have written I would say Mary's friend Gina who is an EMT is a caretaker. Seeing her friend Mary injured in her dream, which happens to be along the lines of her volunteering or career, and she could not stop the bleeding would tell me Mary's friend Gina might wish she could take the pain away or fix the problem Mary is going through. But this is something only Mary can do.
Hope this was helpful based on the dynamics of the situation itself.
Angelique