Wow, talk about ungodly obscure O_O

Who are the other three?

I think these are the four mages.

If you mean as in Magic (Mahö) users, no. It's artwork from Mahoutsukai no Yoru, a novel starring Soko that is now impossible to get. The only magic user there is Aoko, but I can recognize Alice Kuonji. Can't remember anything about the other two...

the male is most likey araya souren from kara no kyoukai and other red head is
tohiko aozaki i think.