How do you say welcome friends in spanish?

Answer 1

If you are referring to a girl you say "amiga nueva" If you are referring to a boy you say "amigo nuevo"

Answer 2

Bienvenidos, amigos (if they're all male, or a mixed-gender group)

Bienvenidas, amigas (if they're all female)

Answer 3

(Name of first friend), esto es (name of second friend)

Answer 4

amigo