Your helper (Susie) becomes available once you reach level 5.
Susie works in a similar way to your friends.
She helps you to progress through the game by allowing you to take and send socks to her as you would with your other friends.
In Open play Susie will give you a set sock that you are in need of to progress out of open play.
The bar underneath Susie in bin friends shows how long it will be until their bin changes.
The bar underneath Susie in the Postbox shows how long it will be until you can send them another sock.