Hello. On The Last of Us wiki I started a discussion about characters who can be found during TLoU game. The characters I'm writing about resemble Marco, Tarma and Venusian Queen. I will be really thankful for your opinions. Link: http://thelastofus.wikia.com/wiki/Thread:38654
Ok, looking at the last screenshot you posted on that thread.
I can see the likeness of the two bottom characters with Marco and the middle one on the left with Tarma. The comparison with the alien on the top with the Invader Queen seems far fetched, though, looks like any other generic Giger-esque alien.