I think that the first girl on the left is talkative because of her thick lips.
The man on the left can be cheerful and calm because the two sides of his face are similar.
The woman who is situated between the two men looks moody because I think that the two sides of her face are different.
Finally if you look at the man on the right of the picture you can see that his hair is thick, so, you can deduce that he is unemotional. Moreover his eyes are close together, so you can think that he is short-tempered.