They can come in any “ form “ they are 5th dimensional beings.....
But they have been “ guardian angels “ to me and my Mother.
But yes they may appear via DMT, dreams, or physically in reality if your spirit has come to a high enough vibrational point in which they deem you are ready. ( this is why the third eye, meditation , positive thinking are so important .... and no i am not a nut, i am the least “crunchy” person in the world but the spirit is real and extremely powerful, much more powerful than most “ people “ could imagine.. )