This 1990 Russian(?) version of the poster for Star Wars: A New Hope is somewhat different from Western versions.
Assuming Darth Vader is the one in the middle, who are the characters along the left and right hand side of the frame?
Some of my answers are, by my own admission, unfettered guesswork. This poster, like the other Star Wars posters from Russia which have come up recently, is probably too spaced out (no pun intended) and impressionistic to make much sense of. I don't recall seeing an animate cactus or a bunson burner in any of the films, for instance. It definitely isn't good enough to go on the fridge.
This answer is a starting point. Others can feel free to edit in further suggestions - or to post their own answers.
The article that's linked to in the question doesn't actually say that it's a poster for A New Hope. My Russian isn't good enough to translate the title but, unless someone else can verify, I'm going to assume that it could be a poster for any of the original trilogy films. So I'm going to put forward character suggestions from ESB and ROTJ as well.
From top to bottom and left to right:
Arleil Schous? Or Chewie?
Ench suggests that it may be Schous, which is probably a better fit than Chewbacca. On the one hand, Chewie isn't a T-shirt-wearing Aardvark. On the other hand, the artist was blatantly stoned when they drew this.
I'm pretty sure that the second of the top left is r2-d2 because of the domed top and flat sides