emerge from (something)
To leave or come out of something. The next act emerged from behind the curtain and took the stage.
emerge from (something) as (something)
To leave or come out of something as something else. She emerged from behind the curtain as beautiful princess in full costume.
emerge (from something) (as something)
to come out of something as something. The caterpillar would emerge as a butterfly in a short time. A new man emerged from prison.