Otto is Gothel's sidekick. He is often seen wrapped around her neck as if a necklet. He loves his mistress and wants her to be beautiful, as he chases Rapunzel away to let his mistress have 'a beauty nap'.
Otto has a horrible relationship with Hobie, whom he wants to eat. Otto tells Gothel when Rapunzel discovers a secret entrance, was in a village and was invited on masked ball.
He also brings Gothel her invitation that she later uses to come to the ball dressed as Rapunzel.
Otto comes to the ball along with his mistress and when Rapunzel arrives, he wants to eat Hobie, but gets burned by Penelope instead. Then, he follows Gothel, going through the tower painting.
In the end, Otto was shown as Gothel's servant and Rapunzel's replacement. He doesn't seem to appreciate his mistress as much as he used to, mocking the way she speaks while making her a cup of tea.
Otto is shown as a crafty, toady servant of Gothel. He always follows Rapunzel, so that he can return to Gothel with a report on Rapunzel's activity.
Otto is a brown ferret. Because of his color, he is imperceptible on Gothel's dress.
- Otto is quite similar to Pimm from Barbie in the Nutcracker and Brutus from Barbie and the 12 Dancing Princesses as they all share the same voice actor, Peter Kelamis. Also, they are all small animals used as spies by the antagonists.