Angels and Ascended Masters are able to manifest in different forms. Very often the guide chosen is not what you would expect; remember that angels are non-denominational and the pictures we may have of blond, blue-eyed angels are our own imagination too.
I have heard of angels appearing as beggars, blind old men, little old ladies, tall Reasyafarians, even angelic truck-drivers. Angels are always around to help us when we really need them, but do we always feel the same way? By treating everyone as you like to be treated, by showing kindness at every opportunity, you too are spreading unconditional angelic love in action.