One of the more interesting alien races in
Zindell's "
A Requium For Homo-Sapiens" universe. The Friends of Man communicate not through linear
sound waves, as humans do, but through
scent molocules. A Friend of Man who visits
Mallory Ringess in the pit of his
lightship is named Jasmine Orange, and accordingly gives off the smell of
jasmine and oranges.
The Friends of Man seduce many humans in Neverness and then proselytize them while they are in their trance-like state. They attempt to convert the humans to their religion. Of course, who doesn't?
I imagine the Friends of Man to look similar, although distincitly different in the head and groin areas, to the Fravashi.