Literally it means, "Who arrives?" It can mean, "Who's arriving?" If said immediately after the sound of an arriving car is heard outside the dwelling, it could go so far as to mean, "Who just drove up?"
arrive
"De quien" means from who?; "De quien(?)-whose(?)";
he/she/you (formal) arrive
Quien duerme = who is sleeping?
quien soy means who am i....
"De quien" means "from whom"
llega means arrives
no
¿Cómo llega el sonido a tu oído? means: How does sound travel to the ear?
Autor es quien llega en auto ante el divino creador, creador es quien provee de autos al autor, es decir, luego de discutir ante el tribunal sobre quien es el propietario, ambos se van en el auto del creador.
Con quien means "with whom"
"Con quien estas" translates to "who are you with" in English.