Sir Jorgenbjorgen

Sir Jorgenbjorgen is the name of a stuffed penguin owned by Elsa from her childhood. It had been siting at the bottom of a trunk that held Elsa's childhood belongings until Anna rediscovers him, during the events of Olaf's Frozen Adventure.

Lore
Back when Elsa was a child and during the time when the Gates were closed and she and Anna were separated, Sir Jorgenbjorgen was her only friend to keep her company in her lonely room. She would often play with his "hair" while looking out the window and tell him her secrets that she couldn't tell Anna, until Elsa had reached the age where she was too old for stuffed toys and Sir Jorgenbjorgen was placed in the castle's attic, in a trunk with the rest of Elsa's childhood belongings.

Years later, when Anna was looking through their old things as she looks for anything related to their Christmas tuition in the attic, Elsa joined her before they looked in her trunk. When Anna found Sir Jorgenbjorgen and handed him over to Elsa, she remembered the secrets that she would tell him and how he was a good listener during her lonely days being locked away from the world outside her room. As Elsa placed him back into the trunk the sisters uncovered a small chest where Elsa kept all of Anna's Olaf gifts to her growing up.