Here are their names, in order from left to right of the first image:
-Dennis: A penguin with an erect crest, refined, dedicated, insistent, and the one who wants to steal the cameras.
-Johnson: A penguin with yellow eyes, serious, loyal, honest, rough, friendly, probably your first follower on Instagram.
-Willbu: A Humboldt penguin, shy, reserved, intellectual, impatient, reckless, understanding, he'll just say "hello" and wait for you to start the conversation.
-Ralphy: An AdƩlie penguin, good-natured, extroverted, talkative, superficial, and a troublemaker. He'll buy you a drink, yes, but he might forget when he's drunk.