come on as

come on as (something)

To be seen in a particular way by other people. Molly comes on as a very cheerful girl, and that's truly her personality—you'll find that out once you get to know her better.
See also: come, on

come on as something

to appear to be something; to project one's image as something. The senator comes on as a liberal, but we all know better. He comes on as a happy guy, but he is miserable.
See also: come, on