Sir Jorgenbjorgen is a stuffed penguin toy owned by Elsa from her childhood.
It had been sitting at the bottom of a trunk that held Elsa's childhood belongings, until Anna rediscovered him.
While looking for traditions, Anna rediscovered the little penguin in Elsa's trunk. Elsa, slightly overcome by the site of him, began to reminisce about how he was a good listener. She then gently placed him back in the trunk.